At work we use XP. The company rolled out all new i3's last fall. I expect we will be using Win7 around x-mas. There has been no word from above but, seeing as the current POS system is a bit long in the tooth and is not being supported in the same way, i.e. package codes are just sent network wide, instead of building a page for the product, which has been the norm, until the i3's were delivered.
So, yea, I foresee an expenditure, shortly after the Business year ends and the stockholders are all impressed, boom! Spend it before Tax season!!