You need Firefox nightly for it to run well, because it depends on the hybrid static/dynamic type inference work and some other optimizations. I believe that Brendan was demoing it from a Mac laptop of some kind.
As far as applications, it will let content providers who want to ship H.264 and pay the license fees do so without requiring all browser developers to pay such fees. (For Firefox it would be a meaningful portion of Mozilla's engineering budget.)
And it's a pretty compelling demo, IMO, of the fact that we're not done with JS performance yet, and that people don't need to be running to Dart or NaCl or other rip-and-replace technologies in order to get great perf. There's a lot of opportunity for even better performance on the engine side as well as the library side: they started a week ago with emscripten, Closure and the libstagefright C sources...
As far as applications, it will let content providers who want to ship H.264 and pay the license fees do so without requiring all browser developers to pay such fees. (For Firefox it would be a meaningful portion of Mozilla's engineering budget.)
And it's a pretty compelling demo, IMO, of the fact that we're not done with JS performance yet, and that people don't need to be running to Dart or NaCl or other rip-and-replace technologies in order to get great perf. There's a lot of opportunity for even better performance on the engine side as well as the library side: they started a week ago with emscripten, Closure and the libstagefright C sources...