There are a lot of very intelligent developers already taking advantage of the 3D capabilities of modern browsers. We expect to see an increase in support for CSS3 3D transforms, a lightweight, mobile-friendly method of rendering 3D graphics.
The HTML5 canvas has been promising greatness for years. This year we can expect to see more mind-bending and impressive apps, games and presentations harnessing the (currently) experimental 3D context with WebGL.
Right now, 3D canvas development is in the realm of the super-geek, and we believe that we’ll see an arms-race as development companies try to build a tool or framework which take it to the mainstream.