Technology in the form of laptops, if the student is actually using the laptop for work and not cruising Facebook or sending emails, is great. Instant access to information that is currently being discussed in the classroom or that will help a student understand a particular idea is wonderful. One of my jobs is at a community college, where the classroom tech is often a lot slower than the students' personal computers, so we do use them.
However, I absolutely, adamantly refuse to allow students to use their cell phones in class, for whatever reason. I hate the things, despite the fact that I own and use one as my only phone. But, my guys know that if there is one thing that they can do to make me angry, it's to try to text during class or jump up and leave the room to answer a call. I impose a penalty every time, but some of them are so addicted, they do it anyway.
Personal technology is wonderful, but I still am Luddite enough to like a low-tech classroom.