One of the biggest drawbacks to playing online casino games has always been the lonely feeling you get sitting at a table by yourself, even though you know that there could be thousands of players all playing at the same casino. For many of us, the social interaction adds to the overall player experience, and that is definitely missing at an RNG blackjack table.
Having a human dealer increases the social interaction, even though the dealer cannot see you on your end of the camera. Also, the fact that there are other players at the table gives you the feeling that you are not alone. Adding a chat window to the live dealer blackjack screen gives you a way to communicate in real time with the other players at the table. All of this in combination makes live dealer blackjack far more social, which tends to keep players at a table for longer as well.