How is that a problem? It never stopped people from using other non-Microsoft products before. iOS, Android, etc are all "new ways" too. There's no start menu in either of those systems, and both feature touch and swipe motions.
There is a mentality difference. People use Windows at work, they know how it works. They expect it to work certain ways. People use iOS and Android knowing it's different and don't have any expectations.
iOS and Android have operated pretty much the same since launch, as had Windows from 95 -> 7 pretty much. Having to learn something new that should be old-hat is much different than learning something new that is new (nto saying 8 isn't, but it's not the same).
When I load up Visual Studio, or Outlook. I expect it to function exactly the same as previous versions. I expect to open files, open settings, add contacts exactly the same as previous versions. When I can't, I get frustrated and feel the upgrade was not necessary and I shouldn't have even bothered.
I write software for a living so I am by no means computer illiterate, and am not opposed to change. However I have more important things to do, than be helping and troubleshooting problems on an operating system/piece of software that isn't really needed, when something that is only a couple years older does everything that the current one does and in some cases better.