At work we are migrating to WIn7 - Office 2010 from XP-Office2003 later this year. I am looking forward to better interface and software (we are stuck with IE8 at present as IT refuse to provide Firefox/Chrome), though supporting users to transition from Office 2003 - Office 2010 is not something I'm looking forward to.

At home, any new PCs I've bought recently have been Win7Pro, but older PCs are likely to get ubuntu/xubuntu. HTPC is on Vista, and is likely to be replaced with Mythbuntu when I get round to it. I enjoy Win7 so far, so any new PCs would have to have it but the cost of licences for older machines, in my opinion, is not worth it.