I'm okay with computers being used, but I don't think we should do away with books. My DD will be taking her state standardized tests on a computer and they practice weekly on a computer and I think this is all good. She also brings home a reading book every week and visits the library weekly or twice weekly and brings home books to read. I think this is a healthy balance.
One of my friends is a professor and one thing she makes it a point to give assignments that require real thinking. She tells them at the beginning of the semester, "I will not give you any questions where you can just google the answer. Let's face it: so much information is at your fingertips with smartphones and tablets. I need to teach you how to think and how to be creative." I think that's why using computers/tablets/smartphones all the time can be a detriment and I'm glad that as an educator she has noticed this and is using it to positively affect her students' educations.
My SIL teaches high school science. She also proctors SAT tests (among others). She says that the school system she teaches in no longer teaches cursive writing but the SAT has a section that requires the students to write in cursive. She makes it a point to tell parents (and her students) so they can decide how to handle it. Just one of those things that makes you go, "That's some craziness right there."