I built a prototype for a tiny point-of-sale! Runs on a powerbank, only needs wifi, boots up instantly! (excuse my recording skills)

I've posted this on another sub before, but i thought that some of you might enjoy this as well! I built a small point of sale prototype! It is tiny, can be run off a powerbank and is really fast!

I can imagine a more mature version of this being used in small businesses, for public transport, public toilets and many other things! What do you think of it? What would you do with something like this?

You can see the source on github, but it is quite the mess, since this is only a quick and dirty proof of concept! Any feedback is appreciated!