Geeks optimize everything. 99$ extra for Win (esp. if you don't use it) is 99$ wasted. Many of us are also finicky about taking a stand. A thousand geeks saying no to 99$ extra is a lot of money and a community in itself.
There are many companies (and government agencies like NASA) that do a lot of high-end 3D visualization and processing on linux. Having one of these desktops would be nice in one of those environments.
