According to a recent study (paywalled), they’re happier:
Out of 140 people over the age of 63, a pretty surprising 61 percent of the subjects said they played video games occasionally, and an even more surprising 35 percent said they played once a week. Okay, so some old people play video games — read: solitaire and/or Angry Birds — and they’re better off for it.
Scientists said that the gamers “reported higher levels of well-being,” while non-gamers reported more negative emotions and a tendency toward higher levels of depression.” The study’s abstract concludes, “Findings suggest that playing may serve as a positive activity associated with successful aging.”