I've been using Windows 7 as my main os for the past couple of years, had to reinstall a lot of times. It's a lot better than Windows Xp, more updated. However, it looks like Windows 8 is going to be terrible, more bloatware and things that are not needed. So, I think Microsoft is going to end up losing a lot of consumers due to that. Yeah, businesses will end up using Windows 8 due to it being pre-installed on computers.
But people are going to end up switching to a linux or mac, even tho I couldn't get used to it. But, that's just me.