A quick read through this thread is proof of why I normally don't bother reading or posting here.
Almost everyone has posted that they feel the next iPhone could look something like this...
...which is completely ridiculous based on logic and common sense. But it has been my experience that Macrumors forums and "logic" and "common sense" cannot exist in the same place at the same time.
Memory also seems to be a problem around here. For example, Apple's breakthrough smartphone that changed phones for forever, was completely and totally redesigned after its first year, because the design was incredibly flawed.
To not understand the significance of this, is really to forfeit your opinion on what Apple will or will not do. You CANNOT logically state that Apple would return to an aluminum iPhone (no matter how sexy it might look), after having already moved away from it.
2 straight years, the iPhone 3G and 3GS have unibody plastic design. The SAME one. This is not a coincidence, or laziness, or any other 4th grade opinion....its what the iPhone is. It's not going to change.
The most Apple will do with the design, is make it a little taller to accommodate more pixels, but the design will remain. They may offer a few more colors, or they may not.
Plastic, Unibody iPhones are here to stay. To state otherwise, is to fantasize, and ignore reality. (which is fine, just acknowledge it please).