Yeah, it's kind of a natural HUD. However even though it could definitely be mimicked with electronics, a biological self-hack would have the advantages of not

Yeah, it's kind of a natural HUD. However even though it could definitely be mimicked with electronics, a biological self-hack would have the advantages of not worrying about battery life, software updates, security, etc. If you were in a future Mad-Max dystopia, you'd definitely want a bio-hack to guide you around instead of a fragile piece of plastic and silicon.