I think that all depends on the source dvd. I once borrowed the first season of Torchwood from someone, and it looked horrible when upscaled by my brplayer. On Native, it looked fine. Avatar, same story. It's the encoding or something I guess, or perhaps wether or not it's a dual-layer dvd. I know that the LOTR Extended dvds are dual-layered, and they worked great when upscaled. It's really not as simple as BR is always better.