I don't think you'll see wireless go away because of the ability to see the video as it's being recorded. One of the things I get a kick out of are the comments the locals make when they watch my television as I'm flying and taping. I actually have both digital and live video in my plane. My Kadet has a total of 3 onboard cameras. I have two live video cameras, with one on the nose and one under the belly looking aft, and a digital still camera on the belly looking out the side.
I have one small camera that I can hook into my video system, that will be aimed in the same direction as my digital in order to line up shots and not have it be so random.