Windows 8 has not and is not doing very well; adoption has been slow and updated versions such as Windows 8.1 and 8.1 update 1 have only brought some minor tweaks and concessions to a more "traditional" Windows. Windows 9 is on it's way towards the end of the year, and I'm sure Microsoft is hoping that it will make everything okay again, the way Windows 7 did for beleaguered Vista users back in late 2009. There are not too many details yet on Windows 9, although leaks and speculation makes for interesting reading, such as this article at Infoworld:
If Microsoft can get Windows 9 out the door in short order -- even if it's only "the way Windows 8 should've been" for experienced Windows users -- perhaps some of the damage from Windows 8 can be mitigated. Unleashing a detailed Windows 9 announcement will kill Windows 8 sales, but that wouldn't change the status quo by much. Releasing a working Preview of Windows 9 would work wonders.
If a near-term announcement of Windows 8's demise is tied to an offer for free upgrades to Windows 9 from either Windows 7 or Windows 8 (8.1, 8.1 Update 1, 8.1 Update 2, whatever) -- including a consumer migration tool like Windows Easy Transfer or Laplink Migration Kit -- Windows might live to fight another day.