Sorry to disappoint but no console game is pulling AA like that. That's either a screenshot photoshopped and sent to Gamersyde and other outlets, or that's the PC version running on something 90% of us can't run.
Those are shots taken directly from the ps4 trailer. At the point they were captured ubisoft had not even shown the PC version due to a marketing deal with Sony.
Gamersyde believes in them, so I believe in them. And the AA isn't that impressive if you look at some of the thin lines.