Just more monopolies coming I'd wager. Disney is supposedly looking at buying EA. Microsoft and Sony have shown they both would rather buy companies and consolidate studios over how it was before.
As others have said it'll be not good for the gamer/consumer. Nor will it be good for people working in the industry.
Micrsoft's gaming head honchos were talking about making a monopoly. And it's clearly the goal. They don't care about gamers or games just hurting Sony (they said their main goal was to kill Playstation). The ActiBlizz acquire showed them they can buy anyone. Monopolies of any kind are bad, and this would be horrible.