Yep haven't gone the next level altho my newest bluray player is 4k capable, but the video/audio at normal bluray level/7ch is just fine and I have more than one setup if/when I upgrade. I'll be glad to let things shake out for a while.
I thought the LOTR blu-ray was an improvement over the dvd myself but didn't spend a lot of time comparing....and do also still have the dvd set LOL. Different player now too, and it is pretty decent with dvd.....might have to check that out. Don't think I've even tried the Tron:Legacy dvd that came with my set; recently I setup a room with some older gear and separated all my dvds from those combo kits....more a summer escape from the heat room so it'll be a while till I go dvd'g.