Seriously.js: A Realtime, Node-Based Video Compositor for the Web
badassjs.com
badassjs.com
Or is there a tool that needs to be created that will compile a fragment shader for WebGL down to .js, kind of like CoffeeScript?
Now all you need is for someone to write an OpenEXR implementation in JS or WebKit and you'll have all you need to build a Nuke killer in the browser. Well, you'll still need the UI framework for the node graph.
i coded some real time video effects demo a year and a half or so ago http://www.barbafan.de/html5video?video=tron i tried to create a lib for video effects then, but ran into serious performance issues, looks like it's time to revisit that topic.