Semi-related, I recently installed the BMC64 distro on my unused Raspberry Pi. It boots directly to VICE, no "Linux" to be seen. It's like booting a C64. You turn it off by unplugging, just like the real thing. The only thing that tells you this is not a real C64 (besides lacking the keyboard/case) is that you can bring up a menu with lots of options with F12 (necessary to mount disk images, at the very least).
Wow, does it take me back to my childhood!