What’s that touchscreen in my room?

Roughly a year ago I moved into my new apartment. One of the reasons I picked this apartment was age of the building. The construction was finished in 2015, which ensured pretty good thermal isolation for winters as well as small nice things like Ethernet ports in each room. However, there was one part of my apartment that was too new and too smart for me.

It is obviously a touchscreen of some sort, but there was zero indication as to what it controls. The landlord had no idea what this is. There are no buttons or labels on the thing, just a tiny yellow light to let you know it has the power.
↫ Nikita Lapkov

What follows is an investigation into what it is, how to get it working, and, of course, how to hack it and make it more useful.