Well as of a few hours ago, the Microsoft News Center and Mojang blog have confirmed the rumour as true:
If you are a parent, it is very likely that your children have already invested many hours into Minecraft on a variety of platforms.
I even play it on the Xbox with my sons and find it great fun (except when a creeper surprises you and blows up next to you).
Click on the logo below to go to the Minecraft website:
Here is a statement from Microsoft CEO, Satya Nadella:
Gaming is a top activity spanning devices, from PCs and consoles to tablets and mobile, with billions of hours spent each year, Minecraft is more than a great game franchise – it is an open world platform, driven by a vibrant community we care deeply about, and rich with new opportunities for that community and for Microsoft.
Official Minecraft Trailer (Direct Link)
The evolution of Minecraft (Direct Link)
For a commentary on the acquisition, check out: