I'm having trouble owning a desktop gaming PC these days. With the form factor of personal computers having gone from the traditional "mini-fridge" to a much nicer "deck of cards" or "thick envelope", I don't really like having to have a giant box and a mess of peripherals and wires that could fit right in a late 1980s computer den around just so that I can play graphics-intensive modern commercial games. I can do all actually useful stuff like reading, writing and coding on a laptop or a tablet, as well as do all the entertainment other than modern PC games. Ditching the desktop box would make the workstation setup a lot simpler.

ETA: Did just remember another reason for keeping it around. I occasionally try to write software, and I need a non-virtual Windows machine to test that it can be ported to Windows.