Well, Windows on a diet running alone in 2 GB sounds reasonable. Windows plus one non-bloatware application running in 2 GB, maybe. Windows multitasking a half-dozen apps, some of them legacy Windows applications like Outlook, Excel or Photoshop, and a browser with ten open tabs? Good luck with that. It won’t matter that the user can switch between the Metro UI and mobile apps, and something resembling Windows 7 and desktop apps, because it all has to fit in a RAM store that remains cost-competitive with a tablet.