Last week, I was at Partner Summit at Seattle. During a session with one of senior executive from Microsoft, one partner representative asked what is the ROI message for Windows 7 adoption to the clients. While there is no doubt that concrete messaging on ROI directly from Microsoft will be useful; I think there are enough data points as a businress case for adoption of Windows 7. The promise of savings of $90 to $160 per PC per annum as mentioned during the launch of Windows 7, improvement in productivity, better efficiencies with new features like BranchCache, DirectAccess, Federated Search and savings due to lower power consumption etc. could also be quantified. However, this computation will obviously depend on individual client context. I tend to believe that as a broad thumb rule for an organization having 10,000 desktops to be migrated for creating a Dynamic Core Infrastructure the deployment cost could be break-even in 12 - 15 months timeframe.