Been there, done that, seen it returned with "not interested" written on it
About a decade ago, I build a prototype very similar that provided a hemispherical (which we chose to essentially mean the ground up - this was really because the first lens/image reader combo I got my hands on to knock it together provided a hemisphere) view from any given location to a tiny tiny flip down screen that could be brought down to sit just above the wearer's eye. Turning your head would turn the view, thanks to the ickle inertial nav device I'd added; you could drive a tank with this thing without having to stick your head out, and ultimately could even have driven it remotely. The next step would have been giving the wearer multiple cameras to choose from (IR etc.) and link the whole lot back to a control station, enabling the provision of written text, photographs of targets, map overviews on request, the works.
The Uk gov rep. wasn't interested so we binned it.