"Enterprise" looks pretty good, but not great, in HDTV. The film is a little grainy, though the purely digital effects scenes (such as spacescapes) look stunning and crisp. It certainly looks a heck of a lot better than in televised NTSC, though. HDNet has been running "Enterprise" on Monday nights, but this afternoon there's a marathon going.
This'll make a good background for some web work I want to get done today, before my day job resumes tomorrow.