What's so odd? Apple hardware runs Windows just fine. I'll bet it runs Windows 10 beautifully. :-)
In all seriousness, I have Windows 7 BootCamped onto both my Minis and my old MacBook, and I'm planning to upgrade the older Mini (a 2009 1.8GHz Core2 Duo with 4GB RAM) from 7 to 10 sometime in the near future. Only thing I'm not sure of is whether the older BootCamp will support it. The old Mini OS X side can't be upgraded past Lion... if not, then I'll have to do it on the newer one, which shouldn't be tough, as it's running Mavericks on the OS X side.
Anyway....
Are those Macs reakky running OS X in a Windows 10 conference? Whatever for? That's just silly. I'd rather believe it's Photoshopped. But my money is on BootCamp.