asm.js doesn't include garbage collection and they're initially targetting C/C++, so I highly doubt they're going to add GC any time soon.
The linked 'future feature' reads more to me like a mechanism to access the garbage collector already present in the browser to allow interoperability with JS and the DOM.
The linked 'future feature' reads more to me like a mechanism to access the garbage collector already present in the browser to allow interoperability with JS and the DOM.