Despite the fact that a broken canopy breaks the HUD's, I read somewhere (not sure if it was on the official forum, the wiki, or the pilot's manual PDF) that the HUD isn't part of the ship but is some kind of pilot's wearable. The idea is that when we'll be able to walk around, this is what will keep giving us information. They also say that it's the reason why the HUD's are the same in every ships, as they're aren't technically part of the ship.
I'm pretty sure that in 1000 years from now, it will be possible to have VR (virtual reality) or AR (augmented reality) systems that tap directly into your brain to provide sensory information, probably using implanted micro computers. In this case, the comms window and the voice comm we use in the ship being part of the HUD, there's no reason they wouldn't be present also when you're not sitting in your cockpit.
I can come up with various things that would contradict this theory, though (broken canopy breaking the HUD, text based comms, voice comm that sounds like poor radio transmissions, etc.). IMO, if we're still here in 1000 years from now, the way we communicate will probably be more like what John Scalzi came up with in Old Man's War (which I highly recommend if you haven't read it).
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