But we already know how to share PS4 games...
... well, maybe. But the American version of the PlayStation website has decided to post a more elaborate list of Frequently Asked Questions that addresses digital sharing, a subject that Microsoft is probably keenly interested in perusing.
You can find the FAQ here.
[headline]UPDATE - 1st November 2013[/headline]
Sony USA have just shared this "Ultimate FAQ":
PS4: The Ultimate FAQ PlayStation.Blog
erm, what?