We have a video, (6:39) unfortunately in Russian, about the new PAK-FA fighter.

Thankfully, there are a sort of subtitles.

The bullet points:

• Only 40% composites, but the Russians are very good with Titanium
• Large AESA array, and size does matter
• There are “5 radar antennae, 3 X-band (7.0 to 11.2 gigahertz (GHz) in the nose, and 2 L-Band (1 to 2 GHz) in the wings, which implies some ability to detect and intercept narrow band low observable targets?
• They claim that it is, “Designed to have superior aerodynamics and sensors to counter the F-22,” and my guess is that the former is true, but not the latter.
• The will supercruise with currently installed engines, and more advanced engines are under development for the production model.
• The aircraft will be jointly produced with India.