A recent job listing seems to corroborate those claims.
The job description states that, “This position involves designing and creating 2D artwork and graphics for the UI Interface as well as other 2D items on various mobile and console platforms.”
As of now, Quantic Dream is currently busy with Beyond: Two Souls which sees Ellen Page and Willem Dafoe starring in the tale of the psychic/ghost talker/bad-ass combat girl Jodie Foster. Beyond: Two Souls is currently releasing on PlayStation this October 8th in North America.
Quantic Dream is also busy working on a brand-new PlayStation 4 title, most likely featuring a new engine as showcased in their demonstration of The Dark Sorcerer at E3 2013. The game might feature multiplayer but no other details are available as of now. Stay tuned for more.