Most of the time I look in my mirror, it is just to check things out, is there anything at a distance coming my way?, etc. A small screen on my handlebar might work ok for that.

But that 10 percent of the time when I look in my mirror, it is because there is minimal shoulder to ride on, heavy traffic, perhaps debris or obstruction on the shoulder in front of me so I want to see if it is safe to veer into traffic lane, etc. On those occasions, a quarter of a second glance behind on my helmet mounted mirror is all I want to spend before I get my eyes back on the road in front of me. The last thing I would want at that time is to have to look down at a screen, wait for my eyes to readjust to close up focusing on a tiny little screen, that might be hard to see in sun, etc. When I look at my GPS, it usually is for over a second, perhaps a couple seconds before I am looking forward again. I assume that a rear facing camera display would be comparable to my GPS screen for that purpose.

Please let us know in a few weeks after you have had a chance to give the camera a try if your handlebar monitor really works for you or not?