Pew Internet has released a chart showing Internet usage for various purposes, for each age group.

The results are pretty revealing.

For example, there's pretty much no difference in usage for buying products. Ages 18-64, run 60-69%. Then it drops off a bit, but even 74+ it is over 50%.

The popularity of using the Internet for health info is stunning, getting the 3rd highest percentage of usage in every age group. This is in the 80-89% range up to age 64, then drops off but still above 50% for those over 74.

The most dramatic (and obvious) differences? Percentages who listen to music and who IM drop like a stone as the groups get older (except 65-73 year-olds are more likely to IM than 56-64 year-olds for some reason).

Here's the entire chart:

Generations 2010: What Different Generations Do Online