Well the big difference is that in Kickstarter you are potentially talking to the wider world, the consumers themselves or at least a representative portion of them, directly, instead of some capitalists who don't care about games at all, they just care about profit. The investment you got out of such a Kickstarter that I'm alluding to would be more of the sort of how much would consumers really value something like an amazing game to be free forever (and forever moddable, used and further developed by everyone else, etc.).
I like schemes where middle men are cut off. Specially if they are of the capitalistic kind.
What is this... this... communist BS, Luis? 
Thing is, yeah it's communistic ideologically, but it does not need any revolution at all, it does not mean people stealing present IPs, it's all voluntary and honest, using capitalistic tools (like Kickstarter) for a communistic goal.
Not that I don't think what all these game companies are doing is good. It is good. Or at least, better than the previous model of having this middle-man vetting ideas based on his small vision of the world.