Without wishing to focus on their age, I don't suppose it's reasonable to ask for renewal from people this old. Not everyone is David Bowie. (Very few are, in point of fact.) Therefore I won't hold the 1980s sound against them in any way.
That said, the world can definitely do with some more 'Heart of Glass' and 'Atomic'-like songs! It's up-to-date and fresh and very runner-friendly!
And though I can't say I particularly respect elderly musicians playing their own elderly songs, I set great store by elderly musicians playing new songs.