I'd like to comment on the point that Marshal gets into, at the 13:30 point, about creating super expensive stuff for the elite wing of law enforcement.
The thing is, this is already practiced, to a point. SWAT forces are better equipped than normal police. Where I live, our police don't even carry guns while we have a special heavy armed and armored response unit, intended for high risk situations, dubbed "The Viking Squad". Realistically, most police forces would continue being equipped with standard equipment, while the high risk units would have the more expensive stuff like a possible Graphene vests. The same would be true for soldiers. It would be cost prohibitive to arm an entire Battalion with super bullet proof power suits while more specialized squads, intended for special missions, could receive the "Advanced Warfare" treatment.
Other than that, graphene can have very positive applications. It could be strong/versatile enough to make light weight plating for airplanes and cars, reducing weight and thus improve fuel millage. The outer most layer can even have a lotus like rough layer, that's self cleaning and prevents icing on planes.
P.S. Regarding the cross-lightsaber.
It's true that the mini-side sabers could allow attacks, like Marla suggests, but it offers no extra protection. There's no sliding down the "blade" with light sabers, and even if it were to happen, the enemy saber would simply connect at the hilt part, not where the energy is coming out. Thus it would lop off the side saber and probably destroy the entire thing.
In addition, this design will not allow those fanciful flurries that we've seen in the previous movies, for the side sabers would inevitably slice off your own wrist. This would force the wielder to fight an entirely different style, which probably leads us back to what Marla was talking about.