The real miracle, though, is not Matilda, but Matilda, the wondrous new musical from London that has just arrived on Broadway. It would be easy to call it the best British musical since Billy Elliot, but that, I'm afraid, would be underselling it. You have to go back to The Lion King to find a show with as much invention, spirit and genre-redefining verve. After plugging through years of slick but workmanlike musicals, crowd-pleasing song cycles and formulaic spirit-lifters (latest example: Kinky Boots), Matilda seems to clear away the deadwood and announce a fresh start for the Broadway musical.