The camera market is shifting from a pure technology race into a fierce legal battlefield. Here is the latest scorecard and frontline update on the global patent war entangling GoPro—the longtime absolute ruler of action cams—and rising powerhouses Insta360 and DJI, the dominant force in drones and gimbals.1. GoPro vs. Insta360: Round 1 Ends with a De Facto Win for Insta360In February of this ye..