|T-14 Armata, photo from Wikipedia.|
The turret is apparently unmanned. The height of the turret roof above the axis of the gun's bore shows that Russian tank designers might have decided that being able to depress the main gun anough to fire from a hull-down position on a reverse slope is more important than that last six inches of height reduction."According to the website RT.com, the Armata "is a cutting-edge vehicle with an unmanned turret armed with a brand new 125 mm smoothbore cannon, which is the most powerful gun of its kind to date in terms of muzzle energy."
If it's a two man crew, they're going to be two very tired dudes. There's a lot of unsexy work involved in keeping a tank running, which is partly why US tanks have that fourth guy along. (He can help out by loading the gun while he's at it.)
The turret shows the distinctive flat slablike facets of Chobham-style composite armor. I guess that milspec R2 unit where the commander's cupola would be on an Abrams is stuffed with sensors intended to replace a dude with his head out the hatch.