The AI Journey is a interesting blog post that discusses the pragmatic approach to AI and use, the pattern for AI and the journey.
The patterns seen are for virtual agents, ambient intelligence, AI assisted professionals, knowledge mining and autonomous systems More details are discussed here.
The question of where to start is being asked in many circles and BI is still the foundation. Without good quality data there is no AI. The largest hurdle I think that needs to be overcome is data ingest quality.