Turn off other displays during playback

Is it possible to somehow turn off/blanking the other displays only when playing media, rather than when launching XBMC?

I tend to launch XBMC and browse/wait for library updates before I sit down on the sofa to actually watch something on the TV. It would be great if I could either manually turn off/blank the other displays or even better have some of logic to do this automatically like:
Turn off when:

• Media is playing,
• XBMC has focus,
• Playback has been running for x minutes
  

It would be great because on pause the main display would wake up and be usable or you could even keep whatever playing and just switch focus from XBMC. Even just an option to do it manually would be great if integrated to a remote.

Is such a thing currently possible using scripts or plugins?

Thanks.