Theme based on weather
Display theme based on weather - like sunny if sunny at location entered, rains when the weather outside is raining, and cloudy, etc.
Harley Nolan Sr. commented
Display theme seems like a great idea, but animating, although also very cool conceptually, could put unnecessary or otherwise additional stress on a heavily worked CPU, especially if using motherboard graphics, perhaps while in other cpu intensive applications. And for all but the "tinkerers", prove to be an ongoing conundrum. Maybe not.
Animate the background of the new "weather based" theme.