You could have a GUI on a PC as well. I developed GEM applications on an Olivetti M24 before I got my first Atari ST. The Olivetti had a B&W 640x400 monitor an

You could have a GUI on a PC as well. I developed GEM applications on an Olivetti M24 before I got my first Atari ST. The Olivetti had a B&W 640x400 monitor and a Logitech mouse that plugged into the back of the keyboard. You could replace the 8086 CPU with an NEC V30 for a bit more speed.