One of the things that can make or break a new type of musical would be the dance routines. All of these different dance types mostly made their first appearances on stage. When you take a good look at musical theatre in general, you can see that one set of dance routines differs from one musical to another. You can't expect all musicals to have the same dance routines. If that was the case, there would be nothing special about musical theatre in general.
Take a look at "Lord of the Dance", which looked to bring and expand Irish Riverdance throughout North America. It's a great dance routine to do when you're at a traditional Irish pub. I, myself, had never heard of Irish Riverdance until I took a look at Michael Flatley's Lord of the Dance. After taking a good look, I had found that set of dance routines to be pretty intriguing. Riverdance has definitely become a dance trend and will remain that way for years to come. There is a strong significance of Riverdance in Irish history and culture. And the Irish have a strong influence with a lot of contributions to American culture.
This is one aspect of how musical theatre has very much influenced the dance trends.
Folk dances from various countries were introduced to North America through musical theatre. Dance is very much one of the most crucial tools to tell a story. You have to attend classes and workshops to pick up on these new dance routines that debuted at the recent stage musicals. But this isn't limited to just North America. Musical theatre has inspired dance trends all across the entire globe.
Indian musical theatre has shown Indian folk dance. It was all modernized and became trendy in all sorts of Bollywood musicals and music videos. Having seen my fair share of Bollywood-style music videos, it is apparent that musical theatre influenced dance trends in India.
Asia's musical theatres have influenced dance trends throughout Asia.
American ragtime and folk musical theatre has very much influenced dance trends in this country. But anybody who has been keeping track of American musical theatre should be keeping up with the new types of dance routines. When there are dance routines, the choreographers teach at classes and workshops, and then the people attend those classes. American musical theatre is the one place to catch all the latest trends of dance in the world.
Those dance routines are spread to the various dance communities. And then they are spread to everybody else like you and me. You've got tap and jazz dancing that were introduced by American musical theatre, and you've got people adopting those routines as trends.
This is how American musical theatre tradition has greatly influenced today's latest dance trends. One can bet that Disney's "High School Musical" is going to influence dance trends for the next few years among America's youth.