This will mess the brain up and cause Kids to learn differently. A new form of dyslexia will come about watch.
You have no proof of this. Either way, as an adult I welcome it. Obviously kids shouldn't learn this way. But technology is already shaping the way kids learn whether you like it or not. Attention spans are way shorter. Kids can barely type on a keyboard but their thumb muscles are really strong due to texting. The list goes on.
You're not really absorbing it though. If I'm trying to really understand something I might read it over and over several times. Plus if I'm studying something I will be highlighting and taking notes. This could be good for mobile ads thoughHow so? you're still reading. Just at a fast pace.
I welcome this innovation.