Mass Effect has other issues apart from shinyness, but I think that fits with the sci-fi theme.
Gears barely looks shiny, but if you want HD beauty, look at the water in Uncharted... it's awesome
Also, I think Killzone 2 looks far sharper than Gears, but I dont think I can really judge on a small screen, nor do I really care which ones looks slightly better, I just want 2 great games
Also, more people would be complaining about the greyness







