I will say to you what Onyxmeth said to me roughly 14 months ago:
Go spend a day in the sales forum, and figure out how sales work. You can't blame PS3 owners because PS3 games don't sell like Halo and Gears, that is absurd. Halo is the most advertised game franchise in the world, most probably, and it's become synonymous with the Xbox brand. It's been there from the start. Like Gran Turismo, or Mario, it will be extraordinarily popular, as long as the developers keep up the quality. Which they do. You can't expect a franchise, in its second iteration, to do much better than Uncharted 2 has done, especially considering the sales of the original Uncharted.
Has it occured to you that most people have no interest in Uncharted or inFamous? Uncharted has the potential to become huge, over time, but inFamous is a sandbox superhero game. You may have enjoyed it, as I did (it's one of only three Platinums I've bothered to get, the others being the Uncharted games), but most people won't, because it is NICHE. A game does not sell on quality, it sells on renown and appeal. Quality helps, but it's by no means the most important factor.
(Former) Lead Moderator and (Eternal) VGC Detective 
