What is the future of WebGL? I have seen cool demos but is this the way forward. So one has a game to develop or a complicated visualization, is it worth investing time in learning WebGL or try to use Canvas directly.
It's a good question. I have an entire bookmark folder of "cool WebGL demos" collected over the years, but have seen very few full-fledged applications.
One way you could hedge the WebGL vs. Canvas bet is to use something like THREE.js, where you use THREE's cameras, lighting, etc and then specify whether it should use WebGL or Canvas for rendering. But then again, you'd be betting on THREE.js :)