I'm not the hugest Boss fan - I love "The Rising" and "Wrecking Ball", I really like "Born In The USA" and "Nebraska", and most of his "classic stuff" is eh - but having seen the Broadway show, there's no doubt he's one of the two or three greatest living American musical artists.
Yeah, it was scripted, and yeah, at the start of the show he concedes he's a fraud (never having "worked" any of the jobs he writes about) but his ability to captivate is unparalleled. I've seen him in arenas, stadia and the theater, and for this one, for most of the show, I could hear him raw (that is, without the amplification) and I was very impressed. VERY impressed.