Interactivity is one thing, but I'd just like to see a simple motion detector hooked up to the GPIO of the Raspberry Pi, controlling the monitor. It bothers me that this monitor is just on all the time.

Detect motion -> refresh the data and wake up the monitor. Or just wake up the monitor since the data is being refreshed quite frequently already.

Also, I don't have any complaints about code clarity, everything seems straightforward.

Well done!