"Small Business" IT World predicts:
I estimate each Vista user will cost your company between $3,250 and $5,000. That's each and every Vista user. Money will go to Microsoft for Vista and Office 2007, to hardware vendors for new PCs and components, and possibly a few bucks to Apple for those users jumping to a Mac. After all, if Apple's higher cost has been the factor keeping your company from trying a Mac, that factor just washed away.
That's a lot of money for small or big businesses. And what makes Office 2007 or Vista better than what you have now. Ummm ... more rounded corners? Or just the fact that MS will someday cut off tech support. Hell, I was happy with Windows/Office 2000.