Some pipboy replaces. I have 2 ideas for them. 1st would be the eye droid from metal gear solid 5. It's cool and it can work with an animation adjustment and figuring out how to display it like a hologram. 2nd would be to replace the left arm with a robot arm. When you access what would be the pip boy a panel on the forearm will open up showing the display. Oh and invisible armor, or separating clothing parts into pants gloves and shoes.