Re: @Orwell
AFAIK, and I know a fair bit, MS have nothing to do with Raspberry Pi Foundation development plans - and if you have heard otherwise, I suggest the source is talking out of their arse.
Their dev plans are much more to do with a) Broadcom coming up with better chips at the same or better price b) Competitors actually producing decent products that they need to keep up with.
MS doesn't even register on the horizon.
And the OS in question is IoT, not desktop, so not exactly going to drag in the children when they have Raspbian to play with (Raspbian has GAMES!)