Apologies on the mis-understanding. I also meant finger-friendly.

The UI that you've shown was based on a stylus-use paradigm, not (necessarily) one of a finger-based one (I know its Logos' and the work they've done there, my mention is on the foundations of that approach they are using).

To say it clearer, anything that we can design that would mean as few clicks/taps possible for a user should be done. Using many screens, or exposing too much chrome - whether landscape or portrait - should be avoided where possible.