We are a very small niche hobby in the grand scheme of things, here are my 3 takes on the future

1.Those who want to fly will still fly one way or another either legally or illegally."outlaw"
2.Semi-Rural or Rural flying sites out away from urban areas will be like flying sanctuaries, you'll be able to fly legally or "outlaw" at those sites no problems. If you did all that is required and legal its all good, and if you fly "outlaw" in the sticks, i doubt the faa will bother you.
3. City/Urban flying will be where it will slowly die off, cause either you become legal and fly in the city, or you fly as a "outlaw flier", the current laws and upcoming laws will hinder the city fliers and fields, either people will respect the laws and jump through all the hoops and be legal fliers or people will just "outlaw" fly and let the chips drop where they may.