Yeah I know - I mean the main selling point for the publishers is that the graphics are new and improved which in some parts is noticeably true but those parts aren't the biggest percentage. It's a shame, really, but Ubi are selling it on the strength of (improved and HD) graphics when that's just not where it's true strength lies.
Anyway, it's worth a buy if you're a fan and it's nice to have trophies for extra replayability, just don't expect it to melt your eyes with pure HD beauty.
(I actually enjoyed Conviction for the co-op, had some great fun with it on XBL)