If by 'believing' in the PS3 you mean backing it because its started to sell better and because people are hyping it, then by all means, 'believe' in it all you want.
I offer a counter-proposal. 'Believe' in the console you 'believe' has good games. And by it.
Yes, Sony has made a massive swing this year. But if you look at the core reasons for it, I think you'll realize its not because the system had an increase in sales or because some people on forums started hyping it. Its because the system got more games and was managed better. The core fundamentals of what makes any console succeed. So if you want to believe in Sony, go for it. I'm going to owe my allegiance into what I always have, into the games a console gets. No matter the console (or Handheld or other platform) its on.
Six upcoming games you should look into:
Essay Pro