There is an awesome movie that details the personal computer revolution, The Pirates of Silicon Valley.  If you ever wondered what might have been happening between Apple and Microsoft, great cast and a really good representation of Bill Gates and Steve Jobs.  In the movie Anthony Michael Hall who plays BillG is having a discussion with Noah Wylie who plays Steve Jobs, where he talks about Xerox and how both companies took tech/ideas from Xerox and used them in their hardware and software.  

Well Intellivision, in my humble opinion, is the Xerox of video game consoles.