While Apple may tinker with the final packaging and design of the final phone, it’s clear that the features in this lost-and-found next-generation iPhone are drastically new and drastically different from what came before. Here’s the detailed list of our findings:

What’s new

• Front-facing video chat camera
• Improved regular back-camera (the lens is quite noticeably larger than the iPhone 3GS)
• Camera flash
• Micro-SIM instead of standard SIM (like the iPad)
• Improved display. It’s unclear if it’s the 960×640 display thrown around before—it certainly looks like it, with the “Connect to iTunes” screen displaying much higher resolution than on a 3GS.
• What looks to be a secondary mic for noise cancellation, at the top, next to the headphone jack
• Split buttons for volume
• Power, mute, and volume buttons are all metallic

What’s changed

• The back is entirely flat, made of either glass (more likely) or ceramic or shiny plastic in order for the cell signal to poke through. Tapping on the back makes a more hollow and higher pitched sound compared to tapping on the glass on the front/screen, but that could just be the orientation of components inside making for a different sound
• An aluminum border going completely around the outside
• Slightly smaller screen than the 3GS (but seemingly higher resolution)
• Everything is more squared off
• 3 grams heavier
• 16% Larger battery
• Internals components are shrunken, miniaturized and reduced to make room for the larger battery

Retina display

The Retina display on iPhone 4 is the sharpest, most vibrant, highest-resolution phone screen ever, with four times the pixel count of previous iPhone models. In fact, the pixel density is so high that the human eye is unable to distinguish individual pixels. Which makes text amazingly crisp and images stunningly sharp.

multitasking

iPhone 4 introduces a whole new way of multitasking. Now you can run your favourite third-party apps — and switch between them instantly — without slowing down the performance of the foreground app or draining the battery unnecessarily.¹ This smarter approach to multitasking is available only on iPhone.

Shoot your own movies in high definition. Capture impressive video even in low-light settings, thanks to the advanced backside illumination sensor and built-in LED light. Then edit and create your own mini-masterpiece right on iPhone 4 using the new iMovie app — with Apple-designed themes, titles and transitions. It’s coming soon to the App Store.

Take beautiful, detailed photos with the new 5-megapixel camera with built-in LED flash. The advanced backside illumination sensor captures great pictures even in low light. And the new front-facing camera makes it easy to take self-portraits.

While we’ve seen plenty of stabs at viable green energy, from underwater turbines to the Bloom Box, we’re always up for another. Running along the same lines as Uppsala University’s algae-based batteries, researchers at Stanford are generating electrical current by tapping into the electron activity of individual algae cells. The team designed a gold electrode that can be pushed through a cell membrane, which then seals around it. The cell, still alive, does what it does best (photosynthesis), at which point scientists harvest chemical energy in the form of electrons. According to Stanford University News, this results in “electricity production that doesn’t release carbon into the atmosphere. The only byproducts of photosynthesis are protons and oxygen.” Of course, the team has a long way to go before this is economically feasible, but who knows? Maybe there’s an algae-powered OPhone in your future…

The 64GB version of Microsoft Zune HD personal multimedia player lets users store about 20 hours of 720p HD video, or 6,400 songs at 320Kbps. The price compares favorably to an iPod touch of the same capacity, which costs $400.

Each ships alongside firmware 4.5, which adds more codecs support, including DivX, access to Microsoft’s Marketplace apps and music store via the AV dock connection and Smart DJ. Smart DJ lets users select an artist, album or song and hear a playlist of similar songs or genres.

So, how much e-book reader can $149 get you? Well, Kobo’s eReader might not be heavy on the feature set, but based on the general impressions from Electronista’s review, we’d say quite a bit. In exchange for dropping the 3G, WiFi, color screen and audio playback frills of the Kindle and Nook, Kobo’s barebones device puts a pretty and intuitive face on simple book reading for a pretty lovable price. The biggest complaint hinges around some slow performance when closing and opening books, but with 100 pre-loaded titles and a fairly budget friendly online library, it seems like the device has you covered when it comes to actually reading things. We also covered Kobo in our iPad book and comics roundup, if more hardware isn’t your thing.

Well, well — what’s this? We just got our hands on what looks like an internal HP Slate presentation given to cool down some of the iPad hype amongst HP employees, and it just happens to have specs and pricing details on the elusive Windows 7 tablet. As we’d heard, the Slate will run $549 in its base configuration, which has a 8.9-inch 1024 x 600 capacitive multitouch display, a 1.6GHz Atom Z530 processor with UMA graphics and an accelerator for 1080p video playback (we’re assuming it’s a Broadcom Crystal HD chip), 32GB of flash storage and 1GB of non-upgradeable RAM. There’s also a $599 version with 64GB of storage, and both models will have a five-hour battery, an SDHC slot, two camera, a USB port, a SIM card slot for the optional 3G modem, and a dock connector for power, audio, and HDMI out. Of course, what this spec list doesn’t cover is software, and we still haven’t seen much of how HP plans to make Windows 7 on a full slate device with netbook-class internals perform as smoothly or as intuitively as its demo videos. That’s not a small challenge, especially since the iPad is out now and setting some pretty high expectations for how this new breed of tablets should work. We’ve got our fingers crossed — show us something good, HP.