Bam, that just happened:

http://www.ign.com/articles/2013/09/13/playstation-4-and-xbox-one-performance-compared-by-devs

PS4 is 50% faster than the xbox, confirmed by the Devs who have received their tool kits. Whats the worst that could happen you say? Oh, maybe Call of Duty playing at 720p instead of 1080p on release.

"In the absence of orders, find something and kill it." -Field Marshall Obs