A change is coming to private investing markets, and it could revolutionize how small businesses are financed: unaccredited investors can start buying stock in start-ups.

The JOBS Act took effect in 2012, helping pry open the initial public offering pipeline that was effectively welded shut in the wake of the global financial crisis, fostering millions of dollars of investments in burgeoning start-ups. The only ones left out of the equation were ordinary Americans. But based on President Barack Obama's speech, they probably didn't expect it.