I doubt it. Let's have a competition and get all the rappers internationally together and see what we think. He's done very well but in ten years, forty years time will his music have the same impact? While there are minority groups being very badly treated, his rapping works.
When things are fairer, as we must trust they will be, I doubt if he will have any kind of following, and as he says himself, he's no great singer. He says some outrageous (often offensive) things, and if these are put in a rap, people who think it but couldn't risk saying it, feel empowered.