Wouldn't it be awesome if every UI was completely different from every other one, so that when we switch devices, it is like learning an entirely different, completely alien, system; where none of our existing experience translates? And then, we have to pore over the manual for several weeks just to get any kind of traction as a user; but in the end, we all feel much more emotionally satisfied because we're no longer deeply concerned someone may have cribbed a good idea and propagated it?
That would rule.