Today, that same creator announces that the teams behind Chrome, IE, Firefox, and Safari are working on WebAssembly.
(I may be excited by this. And I'm claiming full responsibility, of course.)
Brendan responds over on HN that it's not really a bytecode, but instead a compressed AST encoding. Which I know just enough about to get a feel for what he means, but would need to do some research to be comfortable explaining it to other people. Luckily, he then says that he doesn't mind others calling it a bytecode if it makes them happy :->
Original post on Dreamwidth - there are comments there.