There are no laws against paying college athletes in any state that I'm aware of. Only NCAA regulations against it. So I'm not sure how California passing a law that says college athletes can be paid technically changes anything. If the NCAA wasn't inconsistent, pathetic, and feckless in its enforcement of its rules, it would hit every California school participating in this with major violation probation or simply kick them out of the NCAA. LMFAO, we know that won't happen.
Athletes will be employees, they will be taxed, and unionize. It is just a nudge in the direction of institutionalized professionalization. But for the time being, for power conference schools, whether a school and its boosters launder player payments through "collectives" or other independent foundations, or pays them directly, really doesn't matter. Players are already getting paid. Getting paid directly through the school doesn't change much except probably making them direct employees and falling under whatever employee protections come from that. This may make the most difference for mid or low major athletes, but their athletic departments probably aren't generating that much (or any) revenue anyway.