I am very excited about this one. On the web we have JavaScript, which is an open standard and works in some circumstances, but applications that need low-level, efficient languages are left with no good alternative. People have tried to push various alternatives like Silverlight, Java Applets or Flash, but none of them are open. With Microsoft, Google, Apple and others working on WebAssembly, we might finally get a low-level language for the web that is open!