More dispensaries. Nothing else will really change. More variety of products maybe on shelves.

Just an assumption but maybe less crime too. Some people gather to network either to get it, to meet people to get it from, or to smoke it, and then get exposed to other drugs at parties. If people don't have to struggle as much to get it or socialize to acquire it then less exposure to other drugs and antics. I think most people would prefer to smoke alone after work and relax but with the current system they have to get a card and go get it from a dispensary or to meet people who know someone to get it from illegally. Cutting out extra steps means people can just go get and use it freely. According to a youtuber legalization practically kills the illegal market over time so that might be good for reducing violent crime related to drug trafficking? I'm just making assumptions I don't really know.