Let's not start price comparisons. Can you do photoshop on PS3? Can you edit documents ? Can you run professional applications ?
A PC will ALWAYS do more things than a console, and the better you PC config is, the better all your applications will run so it's win-win for all you do with it.
Besides, even games are cheaper and faster to buy on PC. So compare the price of a PS3 with 30 games with one of a PC with 30 games and you will see your argument is wrong.
Purchasing a console to play only non-exclusive titles... I have never understood that.