Thermaltake revealed the stacked Capo X dual system PC case, which enjoys the footprint of a micro tower chassis with some additional height on top, during this year's Computex. Why would anyone want to keep two systems inside the same PC case? The showfloor pitch centred on—you guessed it—AI applications, but there are other reasons besides.
Besides thrashing against local AI models, this double-decker setup will likely also appeal to streamers (it definitely helps if your streaming rig is either already really powerful, or doesn't have to give over resources to the game you're playing). Alternatively, if you have just enough room in your gamer den for two desks but only one PC tower, this could be a space-saving option for you and your player two.
