This may seem a bit random, but I was inspired by a thread in the new game ideas.
It is about elderly people.
You know that computer/electronic games used to be something kids played, now gamer have grown up?
Changes people sometimes observe are focus on plot and detail, not just better graphics, fast paced and lots of explosions...
But what will happen when a significant number of people who are of retirement age (in the developed world at least) have grown up playing computer games, spent a lot of their free time invested in MMORPGs, etc?
How will things change when you go to visit your grandmother and find she hasn't gotten out of bed in 3 days because she's been online non stop?
And how will games change to accommodate a larger number of elderly gamers?