Kind of a dull show this time.
AC is the worst example of stealth game. Don't you ever compare Thief to AC, in fact it shouldn't be said in the same sentence, and unfortunately I just did.
Mark of the Ninja, as tense stealth game is it gets, a nice option, definitely not in the Thief domain.
You should have mentioned "Amnesia The Dark Descend" - it obviously draws a lot of inspirations and atmosphere from Thief (And from Myst especially 3 and 4).
And well - its mostly a game of pure stealth, as you can't fight or kill anything ! :).
Also it's scary. And every Thief game had its scary levels, and as a rule their atmosphere can be quite creepy and intense.
And if you guys really want to while away the time, I suggest playing Thief 3 at least again.
Anyhow, can't wait for this one!! Been waiting for over 10 years.