I looked into this a bit in connection with some of the domains I've invested in. What stood out to me is the Senior Travel sector. Realizing that people take vacations after retirement is hardly earth-shattering. But what interests me is the obvious upward trend:

(1) People live longer.
(2) They spend a greater portion of their lives in retirement.
(3) The senior population is growing.
(4) Seniors remain in good health much longer.

My grandfather just got back from snorkeling and whale watching in Hawaii. He's 87 going on 88.

Not all seniors can afford or will want to go on cruises around the world or ride on camels. But travel and leisure opportunities close to home don't need to be elaborate or expensive. Groups of seniors going to a museum or a concert or a play or a movie -- that will become an economic force to be reckoned with.