There are lots of teens who do not play a ton. And it is more of a guy thing which from a tech standpoint is not great. There are some very good games that appeal to both guys and girls that are not war or shooting themed.
But, there is no doubt that video games are a, if not the, primary entertainment focus. A lot of music and pop culture are coming out of the gaming industry. Whether it continues to keep growing will be interesting to see. Some games are now being developed with an eye toward televised professional competitions. Just punching up Steams numbers for CS Go and there were, at that minute, just over 475,000 people currently playing the game. It would not be surprising to see high school and college teams in the next few years.
I do think gaming has made my two youngest, 16 and 19, more tech savvy. They both "built" there computers with gaming in mind. They have several game systems which get used when friends come over but rarely otherwise. Somewhat surprisingly the 19 year old says there is not a ton of playing in his dorm. To much other stuff to do.