I would like to report that I was able to reach the desired result by using Bluestacks Android emulator with the android version of ScummVM. It works reasonably well and does not seem to be too CPU hungry, keeping the battery consumption fairly low. While it is a little weird to play a windows game ...

I would like to know the same thing. The only guide that seems to promise that is from 2016 and does not work anymore.
Does anyone have a current answer?

Sorry, my mistake. I can't confirm ScummVM works on Windows RT. I wasn't aware that Windows RT was something else than just a Windows 8 upgrade. I myself own a common tablet running Windows 8 and ScummVM works fine. The only problem are the controls as the windows version is made to be used with mou...

Seconded.
The windows version of course works, but it lacks the multitouch support of the android port (at least I failed to find it). Some form of hover mode would be sufficient.