Some things could be added to the hud, Like a Clock, a compass, a GPS (Minimap), a more sophisticated health, hunger, and armor index, displays, and a Targeting system, all in a proper tech-looking HUD.
What do I vision:
The clock, it could be digital or analog, or with images, like a translucent arch simulating the actual clock design but in a single color.
The compass could be again another or together with the clock arch pointing out your heading.
The GPS you devs could partner up with other devs that already have mini-map mods done, and perhaps do your thing to make some kind of slot in IC2 where the minimap mod when installed would be made available to the player to role-play with it.
The targeting system, well, I once tried some cheating clients, and one of them had a sort of a target system that when you pull the bow's string it would actually predicts where the arrow would land, also worked with anything threw-able. Also, you could make it so it aid the player by showing more stuff, like mobs behind walls at very limited blocks density like 1 or 2 blocks thick (server-side could toggle this or limit to only mobs), highlighting ores that are already exposed ofc (we are not trying to make an Xray here are we or maybe we are, with the certain amount of EU/t we could arrange that), as well mobs, animals, resin spots on rubber trees, chests (again the exposed ones). Timers on Nukes, as well when preparing the nuke it would predict its blast radius, same with nuclear reactors. The EU detector and OV Scanner could act here showing the energy flow and info on machines and cables nearby and calculate the ore density when you look at the ground. When you look at a pool of lava or any other fluid it would say what you are looking at and approximate the amount of fluid in mB, when you place a miner it would allow you to see the position of the drill bit under the ground and say in what level it is.
Well I could go on for hours here, there are tons this new HUD could do.
Well the fun part, all those things could be in modules that would require some specialized bench to attach or remove from, or maybe like the way the jet-pack is attached to the Nano-Chest-plate, you could add the modules via crafting, some of them could use iridium to be end-game stuff.
When using certain elements, the helmet would drain more EU.
There's also a lot of ways to making one holds a perfect helmet, the hardest thing to ever happen.
