Remember that feeling you got back when Steve Jobs was unveiling the iPhone, and he did the “slide to unlock” gesture for the first time? I remember the way he said it – “You like that? Want to see it again?”Since then I haven’t seen a lock screen interface that has made me feel that same “how obvious, how elegant!” feeling – until today at the NVIDIA press conference, and later at the Microsoft keynote here at CES. It sounds a little silly, sure, making such a big deal of such a small feature, but it’s just nice to see a genuinely na...