The moves to ban plastic Q-tips, straws, bags, plates, and utensils will have a small impact on the amount of plastic floating around loose, however, that is not the important effect. The important and long lasting effect is the heightened awareness these bans cause on the problems of plastics in the environment. That will lead us to be more careful with the plastic we use, use less plastic and find ways of more efficiently recycling it.
One of the drawbacks of our pastime is the heavy reliance on plastics, almost everything on our boats is made is made of plastic. It looks like there are now serious efforts being made to reuse the fiberglass. Rhode Island is looking at using ground up boats as a filler in concrete.
http://rimta.org/index.php/2018/12/18/boatus-foundation-grant-to-rifvr/
I've heard of power plants in Canada using old boats as fuel for their electric generating stations. The aerospace industry generates a lot of scrap carbon fiber and resin and they are looking at ways to reuse it. One method is to use the glass and carbon fibers in non-structural items on the plane, think sign holders, seat back trays, toilet seats, etc.