Plenty of games run in the browser already, without 3D. There are also plenty of use cases for in-browser 3D that aren't game-related. See Google MapsGL or the

Plenty of games run in the browser already, without 3D. There are also plenty of use cases for in-browser 3D that aren't game-related. See Google MapsGL or the Google Body Browser. It has huge potential for education in the sciences - I've seen a number of interesting medical teaching tools appearing. One of the benefits of WebGL vs native application, is the ability to combine it with the entire set of document-based browser features that you're already familiar with. In fact, this is so useful that some native games these days are doing the opposite - embedding a browser kit into the game for the sake of the UI.