This depends on a lot of things. But it will be a TV or monitor, not both at the same time. Now your MCE PC can have a HDTV tuner in it, using the TV tune and playing games at the same time??? Also keep in mind that most HDTVs are just a monitor and do not have a HDTV truner in them, this is changing and soon they all will have the HDTV turner in them. The best ones I have seen are the Apple cinamavison LCDs. John