A HUD (Head Up Display) allows a computer to display information directly into a user's line of sight and thus allows them to interface with that computer without needing to look at a tablet or whatever. Additionally, if the HUD is combined with some sort of spacial sensing system, it can augment the user's capabilities by, for example, creating virtual navigation cues or highlighting parts that need to be replaced.
Now, since astronauts are probably the ideal a target audience for a HUD system, I'm surprised that there isn't one in current EVA suits already and that the astronauts on the ISS don't regularly use them (eg. google glass/ hololens).
What plans do NASA (or others) currently have for integrating HUDs into spacesuits or into regular ISS operations?