Every motorcycle I have ever ridden had a blind spot. That's why you will see most experinced riders turn then head and glance back before doing lane changes or merging they don't want to reley on their mirror's 100%.
I was thinking of having at least two camera's setup on the bike. They should cover the blind spot. Don't know how I feel trusting a computer, wouldn't want to be on the road and find out there's a 1 second delay on the image.