Now there's an interesting thought, but how many cameras will you need?
1 on each mirror = 3
1 each on front & 2 sides = another 3.
or maybe it is just 1 each on front,back,left,right.
Then you will need a fancy hands free trigger to 'click' the right camera without taking your eye off the road. Should it be a nerve sensing device, or finger tip steering wheel mounted switches?
The possibilities are endless. Why not set Sir Clive Sinclair onto it?