On Black Friday, one of my coworkers bought a new laptop that came preloaded with Windows 8. Last week she brought it in and asked me to look at it because she couldn't get anything with Flash to work in IE.
I know Flash in the "metro" IE is supposed to be severely limited in what it can do, but even the desktop mode IE refused to run Flash. This despite the add-on being present and showing as enabled. After googling around and fucking with it for about 45 minutes, trying to get something to work that should have just worked right out of the box, I gave up and just installed Chrome for her so she'd have something that could run Flash stuff.
She later managed to find a Windows 7 laptop somewhere, bought it, and returned the Windows 8 laptop. When she returned it, the clerk asked her why, and she told him it was because Windows 8 was awful. He told her that Windows 8 machines were being returned to that store in droves, and every person he asked gave him the same reason.
Messing with her laptop was my first experience with Windows 8, and if I can help it, it will be my last. I found it to be a jumbled mishmash of confusing crap, and I've been doing IT for 20 years-- I can only imagine how hard non-techies are going to reject it. I am going to cling to Windows 7 for as long as I can.