Autism has been flavour of the month in the film world for a few years. Movies like Rain Man and Snow Cake portrayed people with autism as holy innocents and savants. More recent movies have characters with more depth, and defining characteristics other than autism.
In My Name is Kahn for example, the lead character is just as important for his Muslim faith as for his autism. Adam is primarily about a romantic relationship. Movies like The Horse Boy focus on families looking for ways to help their autistic children. As our viewing matures, so hopefully does our view of what it is like to be autistic.
Mercury Rising, I am Sam, and The Other Sister are some more recent film featuring autistic characters. There is also a movie based on the book Mozart and the Whale.
You can find out more about autism and Asperger Syndrome in the Source: