Apple is thinking about releasing a technology that prevents video from being captured at a concert. This will basically sense if there is a concert and disable the camera features. What do you all think about this?

Look here...

Could Apple Stop You Filming Concerts With Your iPhone or iPad?

Tim

In the uk, recording at most (or a lot) of live stadia events is illegal, so if the venue has IR sensors picking this type of activity up, then blocking it, then what a brilliant piece of technology

Apple aren't proposing to control your freedom and switch you off, they're proposing to help out with and in conjunction with the concert organisers to halt illegal activities.
Concerts and venues that don't operate this policy won't have IR sensing set up and Apple's software obviously won't kick in.

Im all for it