It looks to me like this only exports animation, which I can certainly see how it might be useful, but isn't really that exciting. The menu they ran the export from is all JSFL scripts (a way of automating operations in the Flash IDE to a certain extent) so they're probably just analysing the timeline and exporting the shape and animation data as JS.

I don't expect to see any kind of Actionscript combined export any time soon though, performance is too much of a hurdle in the near future.