Of course, if all you really wanted to do was see what HDTV content would look like on your super-duper 104cm plasma screen you could always download the HD movie trailers at http://www.apple.com/trailers/ and play them through your PC on your plasma screen.
You'd need a fast PC though, my old 2ghz Athlon struggles to keep up with anything higher that 420p.
You'd need a fast PC though, my old 2ghz Athlon struggles to keep up with anything higher that 420p.