Agree with Jedi.
I rather SailOS. And even on desktop I rather SUSE over 'buntu.
KDE is great, Unity is gross. RPM is better*

On-screen buttons are much better because of four reasons:
- That useless bezel can be shaven off = smaller device
- The size of the buttons is customizable
- The order, action, animation, design and amount of buttons is customizable
- When not in use (eg video) the buttons hide away, giving you a larger screen

Its really the modern route.

On-screen > Hardware > Capacitive buttons