How likely are people using a professional workstation/content creation setup to use metro? Until their creation/development/productivity apps are developed and optimized for the type of machines they use (large monitors, etc..) as metro apps, they'll continue to use them in the desktop as they always have. I think the only time I really see the metro/start screen when I'm in windows 8 is when I'm developing metro apps, everything else I see in the desktop.