I think the biggest effect of this will be that a lot of white suburban Klobuchar-ites will be more apprehensive of keeping the police as it is and a lot of progressives (like me, I always thought it was a class matter disguised as a race one) will take identity politics and racism more seriously and see themselves as privileged white people because it's become pretty hard not to. There will also be a lot of people in poor countries who will relate to the experience of being brutalized by the police and see the US as increasingly like them. I'm Brazilian and I honestly can't really see how is the US any better than my country anymore and in my state I scarcely see the police with more than batons and only in Rio de Janeiro (where drug gangs hide in the mountains and the state government is run by the party led by a former military officer) is the police really comparable.
Organizers might see that strength in numbers does little against FOX News and other media outlets so serious organization (proper mottos for example) might be taken more seriously.
Black people might be energized enough by this to turnout at an equal rate to white people despite the institutional barriers, which hasn't happened since Obama.