I think there's a lot of age-ism in our culture. The stories of people over the age of like...45 aren't seen as 'compelling'.
Though, I'd say that's changed as our bands/artists we go see have aged/gotten older (Metallica, AC/DC, KISS, Cher, Alice Cooper, etc.) and our action stars have gotten older, too (Bruce Willis, Liam Neeson, etc.).
So it's better than it used to be.
But I still feel there's an untapped gold mine in stories centered around older people. Aging is scary and it brings about so many changes, obstacles and scary things.