There's something maybe a little silly and yet incredibly interesting about these kind of tribute acts who more or less take on the personas of the band or act they're paying homage to, rather than merely playing the music. There's a real novelty to it, and it's a lot of fun. Really, the novelty is a large part of the reason that such entertainment is so popular. Still not sure you'd like to see one of these acts - check out the examples on this musical act agency site.