Many Cyber Cafes are now on Linux GUI - its been a quick matter of deciding:
1. do i want my computers seized ? - no
2. do i want to close shop and run everytime I smell Steve Balmer ? - no
3. do i want to pay 150-300 dollars license for each copy of windows for 30 machines ? - no
4. is linux GUI 'hard' for users to use ? - yes
5. can linux GUI do what clients want - eg browsing, word processing, spreadsheets, printing ? - yes
6. screw it then ! they will adapt to linux in time.