And then Microsoft makes money by selling 50-100 Remote Desktop CALs to replace those 50-100 physical desktops. The price per CAL is about 90% of the price per license of Windows. But add in the base price of the Windows Server license, and you're back to essentially the same price.
At first. But eventually, less and less will run on the 370^H^H^H Windows box, as people get native clients (or good HTML 5+ clients) for email, memos and spreadsheets, and only "that legacy .NET app we still have to use" will be on the big-iron rack in the DP donjon.
Net impact on Microsoft's bottom line: zero.