Is this guy a tech writer? This seems like a very short sighted article - this is the beginning of the lifetime of a tablet / laptop device. The beauty of Windows 8 is that it allows the possibility; which is why all of a sudden we're seeing things like the Surface, Asus Taichi, Lenovo Yoga, etc. popping up in the marketplace. As the hardware for this kind of thing is in its infancy, calling it a Myth is pretty misguided.
I think his description of the Surface RT as a tablet that does laptoppie things and the Surface Pro as a Laptop that does Tablety things is a pretty good take. But it's the software that makes the hardware possible.
Honestly, something like the 11" Asus Taichi is my dream form factor, albeit in a a much slimmer, lighter package. But windows 8 makes it all possible, and it was just released a few short months ago.