i dont think they are moving beyond string theory (m-theory) but there is frustration because you can't test it yet, so some believe it is a waste of time. i think that a lot of it is based on it trying to be the "theory of everything"--think it scares some people

has to be b.s. a photon is MUCH bigger than an electron. in order to see something, you have to bounce photons off of it. if you bounce a photon off of something as small as an electron, it's position becomes completely changed (like hitting a gold ball with a bowling ball--and expecting the bowling ball to bounce back and the golf ball to stay where it was)