Well, that's what I'm worried about -- graphical details.
Don't get me wrong -- I love the environments, but that's attention that could be placed into the crime and stealth system.
Big worlds are great to have, but then you'll just end up with something where the missions repeat themselves.
High-end graphics worked out well for multi-genre games like Arkham Asylum Shadow of Mordor -- but that's usually the exception to the rule. Uncharted was a great series to be sure but -- there's great... and there's ambitious.
This game is truly ambitious with the potential to surpass other games of its type -- I'm just worried about the devs losing their focus here.
If it looks great from the start, all the other details can be added in afterwards. If you have a solid engine to build the foundation on, that is half the battle won already. The things that will make or break the game will be mission variety, the combat & the story.