Not sure what to say then.
I just watched a movie on mine last night.. while not quite bluray quality.. it was at least as good as an HD channel.
Either
A) something with the TV..
B) Are you doing this wireles to the TV? Where is the wireless router or rogers gateway in relation to the TV? what package are you on.
Just incase its a wireless signal issue, or something causing it.. i know mine is fine, as my router is right below the TV :P
Have you tried watching an HD stream on a PC in the house? Is it clear there?
(just trying to narrow down if its an issue just between that TV, etc)