Sorry. I just briefly read the repo. So you're saying when I put the cover on the device it will suspend to ram (consuming very little energy) and when I open it again it will come back immediately?
You will have to configure this behavior, as by default that would require pressing the power button instead of using the Hall effect sensors and the magnets from the cover.
But yes, you are correct: it will consume very little power while suspended if you use s2ram (resuming immediately) or hibernate (slower ersume, but consumes nothing)
Linux does support suspend2ram on the Microsoft Go.
Hibernation is just mixing suspend2ram with resume from swap.
The display is not hinged, but the inclinable stand provides a similar functionality.