Whether something like this ever becomes widespread depends on WebGL becoming popular, which in turn depends on WebGL becoming sufficiently secure.
In an interview on the Debug podcast, Don Melton describes hardening WebGL, which involves hardening the whole stack down to the hardware level, as a significant challenge.
IE is never going to support WebGL. They want to be the gate keeper of video games.
They lost it with application and the cloud but they're holding on to the game segment pretty tightly. That's a theory a few programmer have with microsoft and why they chose to create directx.
In an interview on the Debug podcast, Don Melton describes hardening WebGL, which involves hardening the whole stack down to the hardware level, as a significant challenge.
http://donmelton.com/2013/03/25/im-on-the-debug-podcast-this...
I wouldn't hold my breath.