The first sentence is all I needed to read, but I did read it all. In my opinion it is one more gadget aimed at those who shoot without thought, and refuse to take credit for crappy shots. We as a society spend an inordinate amount of time trying to make things "easy" yet at the same time remove the thought, and the learning that comes from those thoughts. People say they just want to take pictures, not worry about all that other stuff, like composition, and in this case worrying if your picture is in focus.
I have been rather disgusted with the refusal of people to DO something and LEARN how to do something, without expecting some gadget to do most of the work. Yes I use a calculator, yes I do use digital cameras, but if they went away I would be able to do what I needed to do without them. Guess I am just getting old. I'm going to go chop up a car now and take it to the scrap yard.