I just realized something: since most people have no idea what AI is, it could easily be used to scam people. I think that will be it's main function originally.
Like the average person does not have access to real time stock data. You could make a fake AI program that pretends to be a trading algorithm and makes a ton of pretend money as the mark watches. The data would be 100% real and verifiable, just picked a few seconds after the the fact.
Since most people care a lot about money, this will be some of the first widespread applications of real time AI. Just tricking people out of money.