I find it super interesting that Microsoft (in 2010) bought an ARM architecture license. I think it will be interesting to see what they do with it (if anything). http://www.eetimes.com/electronics-news/4204863/Microsoft-ta...
The next release of Windows will run on ARM. This is a key point in the article.
DaveMebs: My point is that an ARM archtiecture license is not necessary for Microsoft to port Windows to ARM. There are only 3 or 4 ARM architecture licensees in the world. The architecture license allows the licensee to MODIFY the ARM instruction set/architecture and create their own implementations of the ARM architecture.
Microsoft does not need this simply to port Windows to ARM.
Therefore I think it is an interesting question: Why did Microsoft buy an ARM architecture license?