Yeah, but if someone is running windows on it, no one(outside of the mac world) would even say "Hey isn't that suppose to be running OS X?" They'll just think it's a new Windows laptop.
Mac=OS X
Mac=Not Windows
Even Grandma can remember that. And maybe that's what is the point is here, more exposure for the Mac brand name, so next time Granny is at Wal-Mart, she'll see the Mac mini and buy it for her Grandkids over a Gateway or Dell.