Reality is copying sci-fi again as a flat immobile emitter becomes a device with wide field of fire thanks to metamaterials:
Blah blah cheaper blah blah smaller blah blah better for all mankind. Whatever. What is *really* important here is that we finally have a plausible example of how the Cardassian square beam emitter thingy and even the Federation phaser strip could functionally aim.
Now if the guys could just put multiple devices together and have the energy combine at one point like phasers supposedly do, we could have an awesome phasery deathray.