Just look at this insane demo, between 4:45 and 5:30 in the Famo.us Demo Day 6 video. It turns HTML DOM into a physics-enabled WebGL cloth mesh. There are plenty more to see in the rest of the video as well, but this one takes the cake.
Earlier this year I stumbled upon Marcus Eckert's tumblr where he posts phenomenal UX/UI experiments that he builds in iOS. When I saw some of his folding cloth mesh demos, I gave out a longing sigh, thinking that I wouldn't be able to reproduce this kind of experience for a pretty long while on the web.
Not even a full year later, I'm proven wrong.