ABORT! ABORT! ABORT!
Here it is, Microsoft doing exactly what people told them they do not want. They said they want to aim for yearly release development cycles and simple fact is people do not, nor should want to have to pay a yearly tithe for their computer. PC users already have too much expense maintaining updated hardware, software should be the least of their concern. Is there any realistic need to have upgraded to Win8? Is there anything to legitimately justify win 9? Honestly the only thing that genuinely justified Win7 was DirectX. Had DirectX 10,11 been viable in XP environment you would still see people on XP.
In fact MS is painting themselves into a very dangerous corner. The more they keep pushing things they want but know no one else does, the more they push their users away straight into the welcoming arms of Linux. Hell wasnt a chunk of the reasoning for the SteamOS rooted in how Valve really was not happy with how MS was dictating too many things with Windows 8 and basically said "Pfft... we print money , we don't need you any more"?
So there is no rational (or hell even a manufactured one like DX for that matter) reason for there to be a windows 8 yet, much less a windows 9. Well unless the reason is they are determined to break the Even curse by releasing another OS far too soon no body has any reason to want, under an odd installment.