I agree that it is.. WebGL is new, but if you look at other browsers, they have adopted WebGL as well. So even if it's still sketchy at this point, it's bound to get better. What's more, it is FREE!
It is not surprising really. WebGL was developed by Mozilla with Khronos Group. Khronos Group is the one who created OpenGL which was the first standard in browser-based 3D.