Thanks for your agreement, but the problem isn't just funding, you also have to consider practicality and implementation. As a very simple example, consider the way weapons function with the HUD in ODST, or any Halo game. Somewhere on the ODST is a computer that is aware that one weapon being carried by the soldier is in use, and another is not in use. This computer provides information on where the used weapon is aiming, and knows when to ignore information about the other weapon when it is not in use. Not only can it differentiate between the weapon in the soldier's hands and the one on their back/hip, but it can differentiate between weapons in the general vicinity and used by other individuals. That's a lot of technology for wireless communication and batteries and computer hardware and software that has to be on EVERY weapon and soldier bodysuit just so that the soldiers with a HUD can have a reticle display on their HUD to help them aim... and aren't soldiers supposed to be trained to aim without that technology anyway? It's a case of massive cost and minimal payoff. It is impractical. Yes, you can probably implement such a system with the proper funding and resources, but who's going to allocate money for such a thing? Wouldn't taxpayers be outraged by such a thing? Who are we going to war with that would necessitate this sort of extremely marginal benefit? Even if the human race WERE being attacked by an alien race like in the Halo universe, wouldn't it be better to use all of that technology and resources on other things like better communications equipment for pilots? Long story short, the whole thing is an idea from a work of science fiction which in all likelihood will never happen in real life the same way it's depicted.