"Windows 8 may have trouble keeping pace with Vista. By the end of Vista's second month, it accounted for 2.2% of all copies of Windows. To equal that, Windows 8 will have to add another full percentage point to its share in December."
6 years after the Vista Fiasco, only 3% of computers are running Vista while 22% are still running XP. Microsoft needs to make Windows 9 look more like XP if they want to improve sales. The Metro interface is the dealbreaker for Windows 8.
Underneath Metro W8 offers little to users over W7. Sure they include Microsoft Essentials but that was free already. But by far the biggest problem with W8 is Microsoft's decision to force Metro on every device even when it doesn't belong and even though it becomes an obstacle to using the machine.
Corporate arrogance is the problem, the technology is easy.