Extend api with keyboard events

It would be much appreciated if the developer api could be extended with keyboard event just like in xbmc.

We as devs are bound to the single window execution and the (lacking) pushstate command. As now when a users presses escape from a pushstate, there is no way to update/ let the app now an older window version is popped up. I have heard this statement in the forums several times and I hope some sort event extension can be added to complete the pushstate function set. There is now way to tell the application that it has has been returned to a previous window state and thus making the necessary updates. Most import event would be the escape button, but it would be nice to have this extended to all like in xbmc.