Everything the faa does boils down to limiting liability, and liability is asses occupying seats in aircraft. Want to fly without a medical? Great, you can do basic med but can't fly over 6 people. You want to import a foreign war bird? Awesome, you're going to have to register that restricted and or experimental and you can't do aerial tours or turn a profit. You own a vintage aircraft and are the owner / operator? You legally can fabricate your own parts if you follow certain guidelines.
I hate to burst the "hope" and optimism bubble, but we won't be seeing flying cars or anything crazy from the MOSAIC rules. While I think there will be a lot of positives that come from it, the faa more or less is laying out a set of rules and guidelines for new aircraft and tightening up definitions. LSA was a major failure, and the Feds are realizing that they can actually limit liability and increase safety by making a set of standards and guidelines for small aircraft.
Also, I don't see any "emerging markets" coming out of GA. Flying is expensive, takes a lot of time, and is hard. Real wages also haven't risen since the 80s, and the younger folks have other interests.