Quote “In short, it needs to be everything that Windows 8 is not”
"Microsoft is hoping that history repeats. Similar to how Windows 7 rose from the ashes of coolly received Windows Vista, Threshold is expected to help the company atone for Windows 8. “To distance itself from the Windows 8 debacle, Microsoft is currently planning to drop the Windows 8 name and brand this next release as Windows 9,” said Thurrott while allowing for the possibility that plans could change.
Also from HERE
“Twelve years after its launch, almost a third of the desktops in the world are thought to still run Windows XP. Following the spectacular failure of Windows Vista, Microsoft has found it hard to convince businesses to abandon the trusted operating system in favour of the company’s more acceptable Windows 7 and somewhat experimental Windows 8.”
Microsoft seem to be unable to produce two consecutive good operating systems. It has to follow each success by an absolute dog. No wonder Android is going great guns.