Sounds like the board also somehow works inside a mini-itx chassis or something?
https://frame.work/products/cooler-master-mainboard-case https://frame.work/products/framework-laptop-13-mainboard-ho... https://github.com/FrameworkComputer/Framework-Laptop-13
etc., lots of designs available.
Looks like this would be an easy entry point to a DIY Steam Machine that takes up ~no space under your TV.