I think the goal of running native speed compiled-ish code on the browser in a sandboxed way would be great if it worked. CSS and HTML for "apps" has always seemed like a hack to me. The problem is every single attempt to do this in the past has resulted in a bloated mess. Maybe this time will be different...
The irony is that with WebAssembly maturing, we will have the revenge of plugins, and stuff like Flash is already being brought back, but hey now it is a standard browser feature.
