But would Microsoft have considered Windows if Steve Jobs et. al had not successfully implemented the use of a GUI for the personal computer? And now with the evolution of OS X, it's clear that Apple has certainly put a lot of thought and care into the design and construction of a GUI. It simply is a highly advanced user interface, which when compared to PCs; makes Windows look like a Commodore 64. Which, of course, still has its own appeal and charm.
But thanks for the little bit of information. I was not aware of XEROX's contribution to the field of graphical user interfaces.