[digitalronin]

That's true, but what I'd really like is to be able to change the way the TV itself behaves. For instance, my Panasonic TV will automatically switch to the HDMI input if I turn on my Apple TV after turning on the TV. My Samsung TV won't - you always have to navigate the dumb "choose source" menu. That's the kind of thing I would want to be able to customise. A separate unit would be a good intermediate step (basically, something like AppleTV but with a tuner in it), but a truly hackable TV would be better.