Interesting quote from documentary “The Final Demonstration of the Xerox ‘Star’ computer” http://youtu.be/_OwG_rQ_Hqw At about 27 minutes in :
“Personal interactive software like Star was unknown outside the research facilities in 1978 the year Dandelion (Xerox Star) was started. Apple Macintosh began to catch up, perhaps, to Star’s capability about a decade later. Microsoft Windows took almost 15 years.”
Those guys did alright 
Looks like we’re right on track…
Jimmy