With Realplayer, upsizing video to fullscreen it reduces the blockiness and makes it better for viewing.
New Theatre200 chip, and VideoSoap allows real-time tweaking of the tv/video signal to clean up noise, etc., showing a split screen with half the show normal and half with filter. Makes it easy to tweak, fix colors, clear up signal noise, etc.
That feature (VideoSoap) would be worth the upgrade to me.