Ubuntu 12.04 might be great, but it's still not for the average user

Key sentence: "Unless you know Linux users, you cannot get in-person help."<p>This is, I think, key to OS adoption. Would you have used MacOS way back when if you had been surrounded by Mac users? Of course.

Anyone who thinks you can use the same desktop metaphor for a tablet device as for a PC ought not be allowed anywhere near a UI.