I initially posted this on Trac (http://trac.xbmc.org/ticket/14488) but was referred here. Here's the original request:
Currently the only actions that can be performed when the TV is turned off is suspend or shutdown. For those who use their HTPC for other things than XBMC (such as file-sharing) suspending is not an option. Stopping playback would definitely be nice though since currently if you watch live TV and turn off the television XBMC will keep playing the channel all night long (thus also hogging the tuner).
Currently the only actions that can be performed when the TV is turned off is suspend or shutdown. For those who use their HTPC for other things than XBMC (such as file-sharing) suspending is not an option. Stopping playback would definitely be nice though since currently if you watch live TV and turn off the television XBMC will keep playing the channel all night long (thus also hogging the tuner).