What is this for? If my computer has a output of VGA & hook up to my 32in HDMI TV- Do I get true HDTV? My Computer also has a HDMI output, I thought if I have a wire of HDMI to my TV's HDMI it would bring in true HD TV and it made no big change at all. So how really do we get HD off a computer? Please help me & explain to me. Thanks. Keith