My thinking has always been "don't worry about it--buy it when you can afford it" .. Breaking the bank for a few extra pixels seems pointless to me.

DVD isn't going to vanish overnight, and Ultra High Definition isn't going to replace Blu-Ray anytime soon. I've never understood this obession with resolution myself. Sure, HD looks better, but no amount of High Definition will turn a crappy movie into a winner. So what if I can see individual hairs on Aragorn's beard? I don't watch Lord of the Rings to count folicles.