What will happen to Minecraft after Microsoft bought it?

No one knows for sure, Mojang will still be making the updates though. Minecraft will likely still be on Mac and PS even though they are competitors with Xbox and Windows. All I think is better updates since they have more money to make/design them. You can read this for more details - https://mojang.com/...microsoft/

Nothing will happen. Did twitch.tv lose anything from getting bought from amazon? No? There's your answer.

It's too early to tell. My only guess is that with a full coding team updates will be faster, at the least.