Now we know why XBox made no mention of their GPU at the reveal:
Xbox One's GPU not as powerful as PS4's?
http://asia.cnet.com/xbox-ones-gpu-not-as-powerful-as-ps4s-62221459.htm
PS4 has "50% more raw power" in graphics than Xbox One, says report
http://www.digitalspy.com/gaming/news/a483743/ps4-has-50-percent-more-raw-power-in-graphics-than-xbox-one-says-report.html
Xbox One's GPU not as powerful as PS4's?
http://asia.cnet.com/xbox-ones-gpu-not-as-powerful-as-ps4s-62221459.htm
PS4 has "50% more raw power" in graphics than Xbox One, says report
http://www.digitalspy.com/gaming/news/a483743/ps4-has-50-percent-more-raw-power-in-graphics-than-xbox-one-says-report.html