More bells & whistles... I ride in some of the fastest & heaviest traffic in the country, & I don't even need mirrors. A quick glance over the shoulder & I know whats there!
I think something like that (camera & screen)on a bike is just one more thing to distract you from watching the road ahead!!
Did you guys read that "road kill at 28MPH thread"??
The guy was too busy looking at the side of the road for bottles & cans, & also looking in his mirror at what's behind him & ended up hitting something right in front of him!!! (which is where we should be looking!)