Jeffrey Stephenson's latest deco desktop is the Clean Slate.
The design concept is to eliminate the usual case and instead give each component its own box, each air-cooled and installed on a beautiful maple plinth. It's a beefy system, too, with a recent video card, a socket 1151 Core CPU and 8GB of RAM.
The form factor was influenced by vintage exposed-tube amplifiers like the McIntosh 225. The graphics card I/O plate is custom made from aluminum and includes the system's power switch.
See it naked at Jeffrey's tearup report.
For me it evokes a miniature model of early computing if early computing had never been miniaturized. Imagine if we had ended up with neighborhood AI substations on every street corner and a terminal in every home before the 50s were finished with us...
Teardown is easy, too. Just remove the covers and get hacking:
https://www.youtube.com/watch?v=nQ-Mrypx17Q