This short (2:42) video clip from the longer 60 Minutes segment Apps for Autism is a great representation of just what technology (specifically the iPad) can do for children with autism. You really need to see the spark that it makes for some children. They note as well that it is not for everyone...some children don't respond as well.
A real concern that many people have is for the non-self-directed learners. We can pretty much bet that the self-directed student will find the most appropriate device and the students with more severe disabilities will be directed to an appropriate device, but what about the students in between. What is going to be difficult for us is to find the ways in which our non-self-directed learners can be equally engaged and use tech to improve their academic skills and comprehension of content.