The idea that 'Better graphics = Higher Quality'. This idea was also around last gen, but people hid it away in the closet, because if they brought it out too much, then the PS2 would be blown away by the XBOX, GC and PC. Now that we have the holy HD consoles!!!!....its as if all inhibitions are gone and not only are people obsessed with graphics, they've even gone so far as using graphics as their ultimate measuring stick for the only reason to get a game.
The other thing I think that has been the ultimate downfall of this gen is the complete disregard for any tact from Reviewers for well...reviewing games. Last gen, they at least tried to look like they were being even to all the systems. But now, they just aren't even trying. Everything is just all about the praises of every new graphically powerful and popular game that comes out. From Halo 3 to Grand Theft Auto IV, if people show any interest in it, reviewers will talk it up to high heaven, regardless of the actual content of the game. They might as well give out stickers that say 'Approved for fun by IGN!'
FInally, this is just a personal thing, but people who think the only good games are on the HD consoles.