Got an idea to build a wood based wall mounted PC about a year back and pleasantly surprised with how it turned out (even though it was probably twice the effort and cost that I thought it'd be)!
The mounting surface is Cherry. I CNC cut mounting slots and holes in it to account for each component. The radiator is cut straight through the wood and there is about a 1 inch gap in the back (made possible by some rubber spacers on each corner) for airflow and wire management. Power button is under the desk on the left next to the Uplift controls. There is also a hidden button underneath to transfer both monitors and all peripherals over to my work laptop.