Listening to his music on its doesn't do much for me either, it's pleasant but not earth shattering. But in the context of film, I thought the performance really stood out with an energy and style that contrasted with what comes before it yet somehow felt like a seamless and fitting conclusion to it. To me what those three performances have going for them isn't just the music, but the fact that they reflect something a little more complex about the relationship between the performers, the performance, the music and the audience. Otis in his suit speaks to the past, Jimi with his energy reflects the future and Ravi reflects the world outside of the little bubble of 60s hippies, yet at the same time all three are clearly a part of that world and culture. It's been 8 years and those are the only three performances I remember from the film (admittedly I've rewatched the Jimi and Otis shorts in the intervening years but they got their own films for a reason, I'd say).