I think Unity should stay OSX exclusive forever. I have just started out programming OSX with XCode (Objective-C) and it's so much easier to develop than Windows...
Plus: if you can afford $1500 for a license to deploy your games to Windows you'll also have the money to get a Mac.
Plus: if you can afford $1500 for a license to deploy your games to Windows you'll also have the money to get a Mac.