Not only that, Windows 7 was only one release earlier and one of the features was a push toward multimedia. Is a user with a home theater PC expected to leave the couch, walk up to the TV and slide his finger across it to move icons? A mouse works, and a remote control works even better for some features, but it's a moot point if my TV doesn't support it and my arms aren't 10 feet long.
They needed to come up with a new operating system called Metro that was able to run Windows programs, and to leave Windows alone or improve it. You can't call it Windows if the operating paradigm doesn't use windows. Instead they called it Windows when it isn't Windows, tried to integrate environments that are separate for a reason, and in the long term may have given me incentive to look for viable desktop/home theater PC solutions if they won't offer one.
If I wanted my PC to work like my tablet or phone, I'd use my tablet or phone. I have a tablet. I have a phone. And I have a PC for a reason. My daughter has a tablet PC (i.e. touch screen that rotates and covers the keyboard area to be used with a finger/stylus) and Windows 8 works great. Even with the screen rotated in a traditional position, touch still adds to the experience. But for many tasks, even she isn't used to it after using tablet PCs for years. It's the right OS for her, mostly, but not for me. Perhaps I'll end up with a Mac, not by choice, but because there was no other choice. In the mean time, if I need to use somebody's Windows 8 PC, I get frustrated beyond anything trying to use it as a PC.