Why? Because it is interesting. Find something to apply to that might add value to the business. If a enough people do that, AI techniques might become common place. Get on Kaggle, GitHub your next project etc. Putting what we've learned to practical use is how we can proliferate and disseminate this knowledge. This was the intent of the class in the first place anyway.
tl;dr Using this course as a gateway to your next job is shortsighted IMO.
You can't sit back and wait for AI to "happen". What would that even look like? The benefit of these techniques is in application to existing data; you don't have to quit and found some kind of computer vision/kinect/big data startup to take advantage of the knowledge.
You should be aiming to put yourself out of a job by using AI.