I got this great idea one day to take an old-timey iMac G3 (the gumdrop kind, with an integrated CRT monitor) then gut it, swap out the CRT with a LCD flat panel monitor, then put modern intel kit inside to make a modern PC that appears to hail from the turn of the century. This way, one second, I could be running flying toasters, and the next, very modern games. It would probably also catch all sorts of eyes at a local $tarbuck$ since my mac would be significantly heavier than average.
Other equally valid uses for such an iMac include a boat anchor, an aquarium, or a cat bed, but the upgrade idea eventually won out. Particulary because my model is the graphite grey kind, which looks super classy as a computer. Were it blue or lime, it would definitely be a pet’s home (though grey still makes for a pretty nifty cat bed).