I'd love to see a new 4x4 game now that consoles can actually make the intricate physics work. Think Gran Turismo with Jeeps, Yotas, and Land Rovers. You can add gears, lockers, driveshafts, body armor, winches, etc. and you have classes (trail/rock crawl/mud). The driving is intricate with individual axle adjustment.

A mil. simulator that works. Arma 3 has the potential, except that the controls are insanely convoluted, the servers are dogshit, the comms are faulty at best, the UI is painful, the physics are unresponsive, and the objectives are rarely explicit. An awesome game ruined by half-baked development.