"It's Boeing's latest artist's conception of the
U.S. Navy's proposed F/A-XX replacement for
the F/A-18E/F, notionally needed on carrier
decks around 2025. It's described as "6th
generation", but quite what that means I'm not
sure - expect that it's tailless for all-aspect
broadband stealth, like that other F/A-XX
candidate, Northrop Grumman's N-UCAS."

Source:

http://www.aviationweek.com/aw/blogs...d-4e6c642d4f0e