A little off-topic, but why don't you apply AI to a hot startup? I see your question as similar to saying 'Any hot rails startups?' AI shouldn't be a goal, but a means to an end. You are in a perfect outsiders position to look at various startups and say 'Hmm, maybe AI could help them with ...' Just an idea...
That's my exact thought. Instead of building "dumb" if-else web app, maybe we could build the next-gen of web apps enhanced with AI that might prove to disrupt incumbents. I just wanted to see some examples of some of them at work to get a rough feel of the state of this prospect.