This seems like an important feature to me: I'm not going to leave my Mac on all the time because it's bad for the environment and my energy bills.
Currently I have to boot/wake the Mac up every time I want to use the Roku - my wife usually considers this "not worth the hassle" because it's at the other end of the house.
Much better to let my Mac go to sleep and then spring into life when I turn the SB on.
How about it? For the sake of the environment if nothing else

Andy