A few days ago, the guys at iFixit showed a teardown of the PS4, last night they did the same with the Xbox One, below are some stunning images of inside the machine:
Official Source: http://imgur.com/fkAmFkL
http://www.ifixit.com/Teardown/Xbox+One+Teardown/19718
http://www.youtube.com/watch?v=83PO5Fd8gZ8