I'll give them credit for an interesting way of arranging the crank, con rods, and barrels, to give two opposed piston two-stroke cylinders running off a single crank. I also notice the motor's all shown in CGI cutaways and not as an actual running device. There's also some crucial details omitted in the cutaways that make me wonder how they're solving some of the obvious issues with this engine.
Now, personally, I'm a huge fan of two-stroke opposed-piston motors, but usually in Diesel form. There's also some well known issues with getting these motors to run clean, which is one reason we haven't seen a lot of them since the Deltic motors of the 40's. Does it have potential? Sure. Might even be lighter than a counter-crank arrangement, but hell, the Deltics were popular back in their day precisely because of their power density - finally being supplanted in Maritime service by turbines.
Of course, there's currently some rather interesting engines already well into development with some impressive power densities.
Seriously, though, engine efficiency is great, but we'd all be better off scrapping those 4 ton behemoth SUV's and switching to lighter, more aerodynamic, vehicles.