I love what you've done to your phone! Once my gnex arrives (yeah I know I'm a year late to that party, but I wasn't waiting 2 months+ to get a nex4) I think I might try that out.
As for rethinking the overall theme, I don't see it happening any time soon, if at all. Especially on a large scale. The reason being, people like things to be 'easy' and remembering swipe gestures is hard for most people. The reason apple dominates with market share is because they made a device so simple that literally just about any human being on the planet can pick it up and start using it without much of a learning curve. As we all know, it's not a better product, it's just more simple for the everyman to use right out of the box.
Android, IMO, has found the perfect blend between the two. It's simple to learn out of the box but if you are so inclined, the user can do what you've done to your phone. Customization is critical to androids life and it's evolution. I don't see that changing anytime soon.