no they won't Windows is ran by Microsoft...Nothing will change..Microsoft is buying the company and rights to minecraft. so Mojang will still be working on it..just notch not really here anymore.

Useing an imac

I doubt anything will change.

Actually Xbox is taking over Xbox is 1.8.2 and reached 1.8 a month b4 PC.

It doesn't matter..infact, the xbox version will get different things we get some times.. so each selection will still have unique things..even though xbox has been getting more updates is because Microsoft has control over it
updates will come as fast to pc now

They promised that the updates will come the same day/shortly between the xbox and PC.... I think.