Exactly, why call it Windows 8 if they weren't going to use it for desktops.
They are trying out Apple, Apple. Apple has been smart enough to separate out the 2 different OSs to ensure they feel like Apple, but take the different environments into account. iOS is designed to be subservient to the primary OS for that very reason. That kind of UI is designed to be for locked down systems and as "smart" as they try to make it out to be, it in variably reduces options and breaks the whole idea that is desktop for negative gain.
If they ever release this joke, they are going to have to code in a classic mode or else it's going to make Vista and Me look like the second coming of computing.