I think he's right in a way, and wrong in another way. The combination of metro and desktop programs being used together in Windows 8 is somewhat of a usability

I think he's right in a way, and wrong in another way. The combination of metro and desktop programs being used together in Windows 8 is somewhat of a usability nightmare. However, only using one or the other primarily works great. On my laptop for example, I primarily use the desktop features and regular programs. The only time I really touch the metro-styled areas is when I search for a program or file. This sort of a workflow is almost exactly like one would have on Windows 7, and isn't hard to grasp at all. On a tablet, users would primarily use the metro-styled area (or only use it depending on their version of Windows 8 I guess). I suspect that this wouldn't be too mentally taxing, although I haven't tried it. The problem then is that this kind of use still basically then divides Windows 8 into two different operating systems, which seems to go against Microsoft's goal of merging the UX on different devices. I don't know if there's a real answer to this - I guess we'll see in the next Windows version as the article states.