If you look at the WebAssembly github they have a pretty detailed roadmap/plan of what they would like to accomplish. In the beginning it is essentially what yo

If you look at the WebAssembly github they have a pretty detailed roadmap/plan of what they would like to accomplish. In the beginning it is essentially what you just stated, but after that initial goal is completed they are looking to start diverging from asm.js and begin adding in more features.