I received a 2.9" E-paper display, and I hope to use it for showing the scores.  The display module is manufactured by Waveshare, and comes with handy sample code for Raspberry Pi, Arduino and STM32. This was my first time working with an E-Paper module, and as you can imagine, this is an exciting technology. Even if you cut off the power, it retains the last image, and it also seem to have some memory effect - something you need to clear the screen several times to erase all traces of the previous image. 

I spent the last night making it work on Espruino, and by the end of the night got some promising results:

You can find the prototype Espruino code here. I'm very happy that I got this working! 

Next step: cleaning up the code and optimizing it to display the score.