User blog comment:Master Sima Yi/Assassinews 12-05-'15 — Assassin's Creed: Syndicate has been revealed!/@comment-24760042-20150721220112/@comment-13471981-20150722122853

Maybe it's because the audience for the E3 footage was much broader? People who watched the video of the more discrete features are probably slightly more involved in the AC franchise (and maybe on the fence/interested in Syndicate) and find it neat that Ubi's paying attention to little details. Just guessing here :P