I'm just curious about what it means for the actual UI. If it's just going to be "under the hood" stuff, like Gingerbread basically is to Froyo, then I don't really care much. I just want to know if there are going to be any big (or even noticeable) changes to the UI.
The only thing I've heard (though I don't know if there's any truth to it) is that ICS removes the need for the "home, menu, back, search" buttons most current Android phones have, meaning screens can be bigger because those buttons will no longer be used on newer phones. Which would be pretty neat, in my opinion. But again, I don't know how true that is, and I also don't know how that would even work. Would gestures replace the functions of said buttons, or what?