By definition artificial intelligence is something that keeps evolving based on single algorithm and mathematically expression. Evolving here means, it keeps learning new solutions to the same question and from the solutions to evolves more solutions and so on. I guess this creates a formula which is never ending and can go to infinity. How does it will help in the Blockchain ? I guess its major role will be payed in the mining operations that confirms the blocks and adds up into he blockchain. It may happen that this process will become far easier and self sustaining over the time if AI is used someway. Also, it may help blockchain to get even more stronger in terms of its security and interactive protocols. There are endless possibilities when it comes down to the AI.