Two problems with a lack of "power off":
First, leaving ANY unused device powered-on isn't smart:
With "heat" being the primary enemy of all electronics -- and the Ultra 'box' has no vents on it -- whatever heat builds up inside it has nowhere to go/dissipate.
Additionally, the wall-wart power supply also remains 'active' and I've had more than one of those suckers fail when left plugged in for extensive periods of time.
I keep my Ultra in an open, well-ventilated, space with a small bracket beneath it to maximize ambient cooling, when it's ON.
Using a power strip switch turns OFF BOTH the box and power supply.
(Although ROKU's official response is that the Ultra "draws very little power" that hardly addresses the issue.)
Second, though it's only happened to me ONCE, I've read horror stories from others about inadvertently turning the TV off while leaving the ROKU itself still actively pulling a signal.
The horror, for them, is exceeding 'data cap' ISP usage.
Of course this does NOT happen with the ROKU 'sticks' powered by USB ports: turn off the TV and you've turned off the ROKU as well.
The one major advantage of the Ultra?
Originally Posted by bwillcox
Is not being able to turn its power off a significant problem for people? I just return mine to home and then it eventually (not sure how long that takes) drops into standby mode.
Standby mode, with or without a screen saver kicking-in, eliminates the possibility of accruing mega/giga/tera bytes of ISP usage.
When you REMEMBER to return the device to the home screen!
And for families with children/teenagers that's not a given.
Still doesn't answer the related questions of power and heat.
But the power strip option certainly does.