"Everyone surely must have been in awe of the excellent performance given by Ryse at E3. But unfortunately it was running on a PC using GTX 780s instead of the Xbox One, Ryse displayed that PC is much more powerful than Xbox One."
http://www.thinkcomputers.org/xbox-one-is-less-powerful-than-many-thought-ryse-ran-on-a-pc-at-e3/