I can see a difference with dvd and OTA broadcasts. I am sure I would see the difference with sd DVD vs hd formats. The question is that difference worth close to a 1000 dollars. I would have to buy 2 stand alone players because I am not buying movies 2 times. I won't buy a movie for 10 dollars more I could only play on 1 tv in the house. I switched to DVD when I could afford 2 stand alone players one for each tv in the house people used to watch movies. If blue ray or HD-dvd can get a player out for next christmass that is under 249 then I will move to one of the new formats. The price of entry is just to much for me right now as much as I would love to jump in.
I, too, can see the difference between OTA and DVD. And I'm also sure we could construct a scenario where the difference between DVD and high def DVD (BD or HD DVD) would be obvious. But all things being equal--that is, a very well done DVD versus a very well done high def version--the difference is not as great.
I'd rank it like this, from worst to best:
analog OTA (the bottom 99 channels, here in the states)
digital channels
broadcast High def
DVD (note: some broadcast high def is awesome, but more often then not I see tons of compression artifacts, which is why I rank it lower)
High def discs (HD DVD or BD)
I'm also thinking that if I, somewhat of a whore when it comes to nice TVs and electronics gadgets, is not really blown away by HD DVD, then how do I convince other's to upgrade? My girlfriend's mom recently bought a HD tv and watches all the broadcast content
stretched. This mirrored a similar experience I had with my dad a couple years back when he pointed to an analog broadcast of a football game, streteched to fill the widescreen, and said to me, "Ain't high def great?!?!"
EDIT: I should point out that neither of my two HD tvs are ISF calibrated, which may be an issue with my not seeing significant differences.