Ooooh this could be pretty fantastic for user debugging. Instead of "can you recreate that problem?" Just hit the keys and send the clip of what they were actually doing.
For a better integration the replay would show logs (for a desktop app: the logs of the client machine, for a web-app: HTTP logs) at the same time the video is playing.
E.g. a webmail app, if I click a particular email I get an exception, when the programmer who is debugging the problem is viewing the video, he would see what the server logged a few seconds after I caused an XmlHttp request through my click..
