[zeroflow]

A few years ago, I built a simpler version of that device myself.

As you said: A 90% solution is easy to hack together. I had mine displaying Skype for Business status so my colleagues would know if I was in a call or just listening to music.

The harder part or much rather the time consuming part is getting a good status message from the installed apps. It looks like there is plenty of software and APIs available.