Also, why not have a user setting on boxes, especially Joeys, for selecting how long a TV should be idle before automatically shutting down?
With Joeys eating up tuners on Hoppers, I would choose to set a timeout of like 30 minutes of live TV with no interaction before the Joey would turn off.
That way, my family of inattentive viewers and kids would not screw up recorded events or leave other TV's that might be turned on without a tuner.
So... what happens when you are watching a 1 hour TV show, and 30 minutes into it your Joey shuts off?
30 mins of idle time is far too low with all but a handful of TV programs lasting no less than 30 minutes.
I would think the 2 hour idle time setting is low enough to accomplish what you are asking.