No surprises, except if you're Microsoft
The slow adoption of users and in particular businesses to Windows 8 should be no surprise to anyone. I find it strange that Microsoft continue to be (at least in public) flummoxed by the obvious.
To be fair Microsoft are caught in somewhat of a trap. They need to keep updating thier products & maintain revenue, but there are few new real ideas out there which really add to business productivity and there havn't been since WinXP.
Large businesses depend on thier workstations being reliable and thier staff using them effectively. Whenever Microsoft decide to piss about significantly with the interface, they create massive training impacts for large companies. That's why so many people reacted badly to the Ribbon.
Microsoft fail to comprehend that software is so central to a business operation that a company is taking a significant risk by updating it. "If it ain't broke, don't fix it!!". Upgrading to Windows introduces incompatability, both with other software and with peripherals. In house applications which integrate with Windows may suddenly stop working. We should also not ignore the impact of a OS change on a company's IT pros to fully support it.
I work for an international bank and we're not even on Windows 7 yet. The list of incompatible software which requires re-write was in the hundreds and is still a significant issue. Many of our internal browser delivered apps are on IE8 and yet Windows 8 foists a new and potentially incompatible browser without the option to retain the old one. Fucking great that is.
The business community don't want an OS that looks like a big keyless iPad. The business community don't want to have to shell out for an entire generation of new PCs, or the costs of training, or the costs of redeveloping thier software landscape and testing it, they are nowhere as interested in public clouds or publishing stuff on the web from a toolbar (Sharepoint is fucking bad enough!), and they certainly aren't enticed by Microsoft's veiled threats to remove support from Windows XP or thier unrealistic volume licence pricing schedules.
The only thing that keeps Microsoft in business is that Apple and the other open source alternatives are even worse in many of these regards.