Modern online slots feel more cinematic mainly because they use licensed themes...

https://emilysgreatjournals.quantlynix.com/posts/the-best-way-to-judge-a-slot-theme-in-the-first-10-seconds

Modern online slots feel more cinematic mainly because they use licensed themes and character animation to bring stories and familiar characters to life. Adaptive music shifts with the gameplay, setting the mood in real time