Yes,probably,it will be mucisian the next profession.
And it will be usefull if exept from entertainment it will work like this:
A musician or a whole music band play the music,u go and listen to them.As u r listening to them,they can give u a buff! (ofcourse for an amount of money).
The buff could be something like these:
+10 agility,+10 inteligence,+10 strength+10 psyche+30 hp+20% more succesfull @ mining or crafting and many more.
I think is the only way for the musicians if they ever exist in this world to make some money because if they r going to get peds only for playing music it is sure that nobody or almost nobody they r going to listen to them and pay them as the game has a perfect soundrack!
And grats Klikara for your discovery!