Re: Interesting but clunky
Looks interesting, but hardcoded apps and inconsistent UI design are meh. Useless without universal APIs.
Yup, 'app' type thingies with a probably limited repo will kill this.
Needs a standard screen designation and ability in the O.S. window management to allow specification to a particular screen, then you wouldn't have to rely on 'apps', just a window rule to send the calender/calculator/whatever to the extra screen or not, let the user decide what fits and what doesn't.
(don't know about Windows, not used it in a long time, but) KDE Plasma could do it, but it's multi-monitor has still got faults and flaws too - I don't think a lot of KDE devs use multi-monitor.
It's 2018, and we're headed toward phones combined with large screens and keyboards, treating multi screens as one desktop seems anachronistic and limiting. It's why I keep being drawn back to the deceptively complex window managers.