The Windows 8 debacle is an open invitation for a good alternative OS, alright - but so was the Windows Me debacle, and the Windows Vista debacle, and Linux isn't really any better-suited to fill that gap now than it was then, because the guiding forces behind Linux still don't get usability or simplicity of design.
Linux had a golden opportunity during the netbook craze. Only time I've seen linux pre-installed on hardware in general electronics/TV/ stores like JB Hifi.
And people returned them once they realised what they'd bought!
....These are people for whom "user-friendly" is the same thing as "idiot-oriented;" the kind of people who give the world things like Gnome 3. They don't get usability, they don't get ordinary users, and Linux is never going to get anywhere in the desktop market until they do.
Thats the gist of it all really.
Linux fanatics always blame the user for not being "smart enough", not accepting of linux's "differences", not willing to learn etc. Whereas what the user is saying is that there is a better way to do it, and they've seen it elsewhere.
To which the reply invariably is: " If you don't like like it, make it better yourself, or leave".
The user, invariably chooses the latter option.