One thing still concern me that when I compare HD movies on my 52" HDTV from the Comcast HD channels vs DVD from my dvdplayer, they both look great. I thought, if this is how “High Definition” look then it’s not that much difference from DVD afterall. (?!?)[/quote]
My question for you is how do you have things hooked up to your TV? HDMI,Component, Etc …
DvD - 480p
Upscaling DvD player - 1080i or 1080p ( if the requirements are met, if not it defaults to 480p)
Standard Digital Channels - 480p
ComcastHD Channels - 720p or 1080i
Blu-Ray - 1080p
You should be able to easily distinguish between your DvD and ComcastHD.
There is a difference but it gets harder between 720p and 1080i, and then again between 1080i and 1080p.
You really have to focus on what’s being displayed, the higher the resolution the more fill you will have in your object’s being displayed. Things should appear sharper with more clarity.