Vocals are solved [1] and the workflows are getting better and better [2].
AI influencers and celebs are getting big [3], not to mention VTubers such as CodeMiko [4] and Hololive [5] are huge and increasingly AI-powered.
People are absolutely willing to be addicted to following virtual personalities and artists. Gorillaz predate all of this AI stuff and they're pretty big.
[1] https://www.youtube.com/watch?v=K__IR3J58zU&list=PLRQ_sm_IcX...
[2] https://www.youtube.com/watch?v=Zc3h9iKYKDs (dated by now, but shows the direction)
[3] https://www.thestar.com/business/technology/these-people-do-...