My company uses all Windows 7 Pro 64-bit machines except for our phone PBX, which runs a custom embedded XP Pro. I think that's the only place you're likely to see XP in the future, i.e., I was at a Sheetz and noticed one of their food-ordering computers was rebooting, with an XP screen.
Tried Windows 8 and hated it, and it won't run some of our business-critical apps (SQL stuff, mostly), so that's a no-go!
