I think you are right to be skeptical. In my experience (sitting near/behind students with laptops in class), the laptops are used more for web browsing than for note taking. This distracts multiple people because your eyes can't help but look at the laptop every time the screen changes. My experience is from college and graduate school. But, I can only imagine that high school students are more prone to distraction and will always be able to find the next chat/messaging client before administration blocks it.