It is not an issue of users who want to run WebGL games, it is an issue of developers who want to target customers who run IE. In that sense, you are still virtually forced to use Flash if you want to hit the largest possible market.
Niche / hardcore game developers can potentially ignore this but if you are going for mass market you really can't.
As a web developer at a creative agency, it's impossible to pitch an interactive 3D simulation or data visualization project to a client if it won't work in IE. I'd be happy if even CSS 3D transforms were widely supported.
Right, that is why Microsoft did not include.webgl support in IE, because then the web platform would.compete with their Windows PC gaming monopoly. To get around that people just need to another browser, which is what people obviously should do, unless they want to be.forced to buy Windows pcs for.the rest of their gaming lives.
Niche / hardcore game developers can potentially ignore this but if you are going for mass market you really can't.