Exclusives in my opinion are not bad for the consumer. It actually helped me out this generation. I couldn't decide whether I should have only a PS3 or Xbox 360. I eventually went through a phase just owning one but couldn't be without the other and bought both consoles. I also did the same thing with the Nintendo DS and PSP.
I have all consoles this generation except the Nintendo Wii. It helps me out, it prevents console wars so that I don't segregate between one or the other. And I have a chance to play all those games that are exclusive to that console. I feel as though it was worth buying all consoles :D
On top of that if there weren't exclusives then consumers would just pick one console this generation and it would of been the Nintendo Wii of course :D
But with each console maker releasing content aboard, it actually helps the market continue and grow :)