nutekejo screenshot'ai :) here we go:
http://gamemag.ru/news/pervie-skrinshoti-novogo-thief-84980

Here's a brand new look at Thief 4, thanks to leaked screenshots obtained by
a user named Gamesmaniac on the European social network VK.com. Head over
there for all the shots.

According to a Google translation of the Russian site gamemag.ru, Thief 4 is
being prepared for next-gen consoles, and it will lose the 4. Just Thief
now.

This lines up with hints and teases we've heard about the Game Informer
cover reveal today, which is planned for 12pm Eastern. Game Informer has
promised that they'll be revealing a next-gen title, and in response to
rumors yesterday that the cover will be Thief 4, GI editor Andy McNamara
said that the cover doesn't have a 4 on it. Maybe it's just Thief now?