Ubuntu could easily emerge as a force to reckon with in the mobile industry. Perhaps a stand-alone Ubuntu platform won’t succeed (cause it lacks major backers), but Ubuntu for Android definitely has a chance. Just imagine using your regular Android smartphone as a full-blown Linux computer when you connect it to a bigger screen. Powerful stuff…
That said, I would like to see the upcoming Android 5.0 Key Lime Pie shipping with a similar capability. Google is already targeting laptops with its Chrome OS but at one point in the future, we expect to see the two platforms merging.
rest here 
Also: The Insidious Nature of Chromebooks