Funnily enough, that's how Franz Liszt became (arguably!) the first rock star!
And what about Ravel's left handed piano concerto?
Folks have always liked spectacle, which is what Mr Berthoud is providing. And as for his music, I find that far more entertaining than the usual average stuff (me included!) I see at most gigs!
Though I rarely sided with those who thought Mozart's music had "too many notes"...