Don't joke... It will go that way sooner or later. Integration of GPS, comms, targetting, pulse/BP etc, NV (and video uplink, of course). The old DARPA programme had some of that stuff hooked up to a rugged 386; things have moved on a bit since then.
I just have a bit of an aversion to depending upon battery-powered kit for everything, especially in that sort of environment. There was a project to build a solenoid-fired SA80 - now *that* was a terrifying idea.
Anyway, stick a Bluetooth phone & headset together and you have a personal network. Add in a PDA, camera, whatever and it gets much sillier much faster.