At #MuseumOfComputingSwindon, I was especially taken by this Amstrad PC1640, a (mostly) IBM-compatible machine running GEM 2.0, the same Digital Research GUI as the Atari ST.
GEM was a cross-platform, highly compatible GUI framework. Apple initiated lawsuits against Digital Research intended to kill the platform, despite Apple having stolen the concept of the WIMP GUI lock, stock and barrel from Xerox PARC. Between this and Microsoft undercutting DRI with their shitty clone of CP/M named MS-DOS, Digital Research's days were numbered.
I wish we lived in a computing universe where good people like Gary Kildall had won out against the psychopathic creeps Bill Gates and Steve Jobs.
This machine is a glimpse of that other universe.