Screen wrap would be cool for battles between a few ships, but can you imagine with fleets of 30 or 40 on both sides, and hundreds of fighters? Yikes. What a mess.
Anbody remember what "Asteroids" was like after you broke up a few big boulders and you had a bunch of little pebbles flying around in 360 different directions? Now multiply that times 100, cause half those pebbles area under your control, and half of them are shooting at your pebbles.
Even with it being turn based and not real time, that would get hairy real quick.
Of course that would be one way to even things up between the ai and humans in tactical combat.
Geo