THe problem with using cameras in place of side view mirrors is people won't bother checking out the window to see what's going on before turning or changing lanes. See it all the time with backup cameras in parking lots where they're not shoulder checking to see what's around them they're backing straight out staring at their dash. At least that lexus one from the article has pretty decent view and puts the screen where it does give you the chance of seeing something out the window. Some of the ones they've tested/shown before the screen is on the dash where you're not turning sideways at all.

If you're a good driver you don't need all these extra features to be able to drive.