They didn't "nail" anything. They took advantage of Microsoft's epic blunder. I think we know what really happened:
"Sony changed its E3 2013 presentation after Microsoft’s blunder"
http://ps4daily.com/2014/07/sony-e3-2013-presentation/
Not to mention the fact the PS4 was originally going to ship with its camera for a higher price and you're extremely ignorant and naive if you think that Sony didn't also have a very "all digital" future complete with DRM.