I didn't think they made plasmas in anything less than 1080i - or p, even. And, that size could be plasma, or LCD, or LDP.
As for 480i, in general, all these people are getting CRT TV's with that resolution.....1) the pictures they've shown seem to be pretty decent, but they're not that close, 2) we don't know the resolution of the cameras they're using....so I'm skeptical.