Besides, you should be more concerned of your front path then your rear path. Darn, i have hard enough time checking my GPS route. I would'nt go there.
I'm not old enough that I need a back up camera on the bike.........yet.
I'm sure many of us use the GPS in more then one application.
For me, my GPS goes from the truck to the bike to the boat (mine) to whatever boat I maybe working on to whatever other vehicle I may be using.
As for video inputs I would love to see my favorite vehicle GPS (Garmin 478) accept a 2 source video input, one for a trailer hitch viewable camera and a second for the rear of the trailer view.
One step further would be switiching the hitch view to an inside the trailer view.
The capability is already available, just not for my GPS.
60-70K worth of bikes in a trailer it would be nice to keep an eye on them