Many bloggers and reviewers are wondering why Apple chose to use glass for the back of the iPhone 4 instead of plastic or metal? After all, the iPhones of previous generations from the 2G to the 3GS were all doing fine with plastic backs.
I think there's more to it than just aesthetic. While hold the iPhone 4 this week during typing and gaming sessions, my fingers were absently gliding over the smooth glass back. My first thought was that the iPhone 4 was sturdy and the industrial look was a good change from the previous physical forms.
Then my second thought. Hey, multi-touch on the glass back? More at On Apple.