Good
The entire idea of one GUI to rule them all is bonkers.
TVs, phones, eBook readers, mid to large tablets and stuff used mainly with keyboard / mouse all need different nuances to the GUI, different resolution/screen percentage per interactive element and text sizes as they are also used at different distances too.
Unity was doomed. As was Windows 8 (phone centric on desktop) or even Windows CE / Win Phone < 6, as that was a regular WIMP desktop, on a too small screen which is why it was resistive with a stylus. What idiot thought a Win9x desktop was suitable for 320 x 240, or the Win phone 6.5 Zune like interface suitable for a laptop with no touch. What moron thought changing menus or ribbon was a good idea.
Really Ubuntu needs to IGNORE Microsoft Windows and Apple Mac, go back to WIMP GUI basics and take a course at Norman Nieslen Group.
Ditch FLAT, avoid hyper realistic and rendered. Simple highlight & shadow, a bare hint of 3D like Win3.11, Win9x, NT3.5x 4.0, Win2000. No eye candy OR newspaper flat.
Mozilla take heed too!
Biting the hand that feeds IT
