Microsoft in the wake of the first true Windows 8 reveal has explained some of its goals for the OS. Windows division head Steven Sinofsky reiterated at D9 that Windows 8 PCs using ARM won't have an emulation layer for older apps, requiring that the app have been written for Windows 8 from the beginning. The shift could be large as it would eliminate the sheer legacy support that has been Windows' core advantage for years.
