To watch a DVD on a 50+ HDTV verses a Blu-Ray on the same; there is a world of difference.
This. There is a big difference from DVD to Blu-ray. That's as far as I'll go, though. I don't see 4K being in my future.
Thirded. I own a Blu-Ray player just to get great picture quality and
sound quality (ass well as extras which are no longer on standard DVD sets), even though all I have is a standard LCD screen. I want to buy the show on Blu-Ray, and eventually get a HDTV set to see the show on.