Unity Games in WebGL: Owlchemy Labs’ Conversion of Aaaaa to Asm.js
hacks.mozilla.org
hacks.mozilla.org
And as a fellow hardcore gamer, this lower the barrier to pc gaming a lot, and it's a great step!
Not really. There is a big difference between writing manually and transpiling into a dialect.
For those who haven't seen it, there's a live demo here: http://beta.unity3d.com/jonas/AngryBots/
I find it really easy to upload and play games.