User blog comment:Master Sima Yi/Assassinews 03-03-'13 — Assassin's Creed IV: Black Flag trailer and screenshots/@comment-5638823-20130305153306/@comment-5174994-20130305190850

It would definitely help in stealthy aproaches. It's not like you can hide behind a small bush in any of the other games, so this would be a great stealth feature to add.