Social-media has created easier ways to converse with other humans, thus children seem to not be going out with their friends as often. Although, to a degree, I guess the social-website could be used as a way of arranging meets. Like trimar7 stated "double edged sword".
Advancement in cleaner industry means that we're more hesitant to purchase large, gas-pumped cars. We also frown more at polluting then we ever have done.
The internet has created a means for some socially-awkward kids and bullied children to make friends. I know quite a few people that're good friends with many 'interneters'.
A lot more people listen to music in public places, via headphones. This appears to be every-age range, although people within the age of 16-24 enjoy showing off a big disposable income by purchasing big, expensive headphones. They normally project the music so loud everyone can hear it on public-transport, so everyone notices.
There's a lot of ups and downs of technology, like anything in the world. I believe the goods beat the bad's, which is more than I can say for some branches.