People just don't like change and will complain about anything that is new. Even 20 years later, you have a bunch of grouches out there who are still missing the command line interface that MS-DOS provided.
As good as Windows 8 is however, it is still not anywhere near as good as the Mac OSX operation system. When Apple acquired NeXT computer in the late 1990s and adopted their OS, it was all uphill for Apple from that point on. It will take another 60-80 years, but eventually the Apple OS will surpass Microsoft OS in market share. However, there will be strong competition from the Google and Tcer6x platforms over the next few decades (BTW, Tcer6x has not yet formed as a company but they will be a major player as we head into the middle part of the 21st century.
The old saying “if it ain’t broken, don’t fix it” still applies.
I've brought up many reviews where people just pound on it, and not mere "users" but people actually in the field. Developers,etc.
As I said above, going to hold off on purchasing this puppy for awhile. Some are suggesting a Service Pack will come out that will "detour" the WIN8 UI. Who knows. But MS sure upset the apple cart with this one...