It seems to me the hint is in all the different sized squares. iOS is going variable screen resolution (which it already supports, only no-one really cares). Mac OS X is probably going to let you treat any display like a Retina display (this kind of capability is already everywhere, but only available in certain contexts, e.g. when mirroring to a different resolution display). Between TVs, cars, 4K, big iPhones, and so on, Apple has to bite the bullet and just support arbitrary screen sizes.<p>Incidentally, has anyone noticed that Apple's push towards simple geometric UI design in iOS7 has simultaneously reduced application sizes (less need for giant bitmaps), improved performance and battery life, and paved the way for more flexible screen resolutions.<p>This also likely means we're finally going to see the Apple TV as a games console. This similarly means that third party TV apps will probably appear (and thus we'll get CBS, Showtime, etc. on the Apple TV itself). (<p>Obviously Amazon has beaten Apple to the punch, but I suspect the Apple console might have quite a decent launch lineup.