I ordered a Mini and a Thunderbolt Display yesterday. The question is now, as the TBD can't be turned off, how can I airplay mirror my desktop to my TV and turn off the TBD? I can't disconnect the power plug as I would loose all the accessories connected to the TBD this way, and afaik it has no "backlight to 0" setting like the MacBook Pro's. Is there a way to "make it black" while using the airplay mirrored TV as main screen?