Do the others have battery power base units? From the logos they were players for the media, but were they capable of doing slide shows and VCD presentations as standalone embedded processor gizmos? A teardown comparison would be interesting, anybody got pics of the Kodak/Philips base unit?
Now I'm wondering about Software/Hardware Apple development may have done or outsourced (from Philips?) to extend the capabilities of the baseline media players? I've always thought of it as "just a rebadged Philips product" and now it's clear that it was much more than that.
Since SCSI is a general purpose I/O standard, I wonder if it would be possible to develop an OS to run them as an old school 8bit home computer via Small Computer Systems Interface. MiniComputers were considered small when Shugart developed SASI during the production lifetime of the Apple II! It'll boil down to what SCSI controller is inside the base unit whether such a crazy software/firmware hack would be feasible, given a capable controller.
Less insane would be to see if there's room for BeagleBone or Rpi wedged in at the ROM socket for WiFi/Bluetooth connectivity. Pretty neat little battery operated case we have here and so much more powerful than MiniComputers of the SASI/SCSI 1 era.