The article doesn't even touch on what I think is one of the coolest features: the ability to change update modes locally in subregions of the panel. And even better, they're already working on integrating that with the Wayland Content Type Hint protocol to let the compositor automatically pick the right mode for a given application for you, which then would work even if multiple applications are on the screen[0].
[0] https://www.crowdsupply.com/modos-tech/modos-paper-monitor/u...