While I wouldn't go that far, it'll be very different from the last three.
But it will give the 'In what world is Kylie a legend, they should give it to a real legend like Old Papa Realmusic' demographic a moment in the sun.
Not really. There's always been a mix of more nostalgic fun stuff (Tom Jones, Shirley Bassey, Neil Diamond) and more serious Mojo-rock (Paul Simon, Ray Davies, ELO).
Watching one of your faves support a mega-act in a stadium is usually a sobering experience as they perform to general indifference and huge swathes of empty seats.