spincut, here is the basic point you might be missing in all of this:
Given your user needs (correct me if I'm wrong, but.. you're not a 'lean in close to the tv' gamer nor a 'computer hooked up to the screen' user), even if you decide to keep the panel for the next 15 years and even if every single content source magically converted to 1080p tomorrow... HAVING 1080P AS A PANEL FEATURE WILL PROVIDE YOU WITH NO VISUALLY DISCERNIBLE BENEFIT WHATSOEVER IN A PANEL OF THAT RELATIVELY SMALL SIZE.
Now, unless you are anticipating a present or future seating arrangement in which you'll be sitting within 4 to 5 ft. of the panel or you anticipate eventually using it as a computer monitor.. then maybe, consider a 1080p model in a 40"/42" size. For anything else, or any viewing distances beyond that.. there really is no point to it.
and btw, blu-ray/hd-dvd will still look great & be worth it, better than standard dvd. More data bits built into your content source, the better your image will be. It just won't look any better on the 1080p panel than on the 720p panel in that 40" size.