Last week's preview of iPhone OS 4.0 gives us more clues of what to expect from the new iPhone 4, (or iPhone 4G, or iPhone HD, whichever you prefer). The v4 home screen now looks very similar to that of the iPad, and if John Gruber of Daring Fireball is right about double resolution displays, we can expect the icons to be similarly spaced out as well.
We've mocked up how we believe it would appear on a 600 x 900 display. Of course, the great thing about double-resolution is that apps not yet adapted to take advantage of the iPhone 4's double density display can simply run in a pixel-doubling mode, (i.e. at half the resolution).
We've also made a couple of minor corrections to our iPhone 4 mockup: moving the volume to the left-hand side, and moving the antenna to the bottom. Thanks to the many people who picked up on these errors from the previous visuals.
As usual, these mockups are just speculation, for fun. Any suggestions/corrections, please send them in.
Click on the screen mockup for a full size render.