I could be wrong, but I think Stewart was referring to having a movie play from the hard-drive of a computer. An XBox will play a DVD. But, if Stewart did mean playing a DVD from a computer, then all that would be needed is a cable to go between the computer and the TV. I can do this on my Mac in a variety of ways and the Mac laptop basically replaces a DVD player. It's a mess doing this, so I only do this when I go on vacation and I bring my Mac laptop and play DVDs on the hotel TV. Of course, one could download a movie onto the hard-drive and play it back on a TV too with the proper cable, but doing this is a pain too and I find I'd rather pay the low cost of a DVD rather than spend the time and effort to rip and convert a DVD onto my hard-drive. Plus, the movie data takes up a huge amount of space.