Developers/Publishers are moving away from exclusives as it limits your income. Why shut out half the gaming population?
I don't like the some gamers get shut out, but exclusives are usually better than multiplats. Especially the palts that it just gets ported to and isn't built from the ground up to run on.
Also where does 1/2 of the gaming population come from? There are more than just play station and xbox.
There is a difference between making a game exclusive because that's the only way to make a game high quality, and making it exclusive because of contract agreements.
Heck, the ones that does the latter usually have a multiplatform architecture, but limits their potential for the sake of contract or bribe money.