Yep, I track all this at drawlogic.com. Firefox and Chrome also have hardware acceleration in latest. Safari has it as well but only in certain cases (Apple actually made canvas and open sourced it and it is hardware accelerated in CoreGraphics).

It will still be a couple years before this is mainstream. Where on mobile OS updates and browser updates on iOS at least are faster to be adopted (about a 6 month OS adoption rate which is much better than even browser updates on desktop).