I too disagree with the article. Has Windows 8 had it's problems? Yeah, certainly. I think that 8.1 addressed a vast majority of those issues.
The article is misleading at best. With Windows 8, Microsoft went on a planed year by year updating of the OS. gone are the days of "Service Packs". It's been replaced by a dot release. This coming October they will release Windows 8.2 which will be a free upgrade as 8.1 was. As someone already said Windows 9 is a couple years down the road at best.
Computers have changed drastically in form factors. Windows 8 has had a huge impact. Traditional desktops are a niche market, and touch screens are almost everywhere. I think touch is a huge thing for the DAW world and Sonar took advantage of it in X2a.
The fact is that Microsoft has been working with several OEM vendors on touch screen capability for years, even way before the iPhone/iPad. They were working on this stuff back in the early 2000's. There were two problems, 1.) it was too expensive, 2.) XP was a horrible touch screen experience.
Windows 7 I think was the first OS to have built in support for touch devices. For XP and Vista, I think it was a special distribution. However Windows 7 only handled 2 point touch, and touch was not a great experience on Windows 7. Windows 8 completed the experience with 10 point touch, and a tweaking of the user interfact to take advantage of that.
Windows 8 was the most radical change to Windows since '95. And yeah it didn't go over too well. I think it was a mistake to have it launch you to the metro start screen on bootup. I think the change was too jarring. I think 8.1 fixed a lot of things, and I work 90% of the time out of the classic desktop. With the new start button added back in, the metro start screen works mostly like Launchpad does for Mac, so I don't see it as a big deal.
As far as stability, speed and mostly security, I wouldn't use anything but Windows 8 at this point. I still use Windows 7 at work and it's still a great OS. But I wouldn't go back to 7 on my DAW machine. One of the best features of Windows 8, is built in multi monitor support for the task bar. No more purchasing 3rd party apps to extend your task bar!