According to webmd.com, video games can be helpful for children with dyslexia. Specifically, the study showed improvement when the children played action games.
My child with dyslexia is more into Wizard 101 and MindCraft, both of which seem to help him with his dyslexia simply by getting him to read. Because reading is so laborious, my child with dyslexia resists any attempts to get him to read. He will grudgingly complete his homework, but good luck getting him to read a book or magazine on his own time. However, my child with dyslexia will willingly read the messages that his friends send him across the screen as he is playing Wizard 101 or MindCraft.