Due to this pandemic, online casinos are more given more attention than real casinos but I think it will not totally replaced real casinos. Experience in real casino is very different from online casino. Some are not fully satisfied in online casinos. The sorroundings in real casino is also very different from online casinos.
I also think that the question itself is incorrect, because one cannot replace the other.
Online casinos as an entertainment option while live casinos are closed due to quarantine - yes, but constantly I would not be able to play like that. It does not bring such pleasure. These are completely different things.