I see the change in the level of comfort that is expected by people for 100% of the time. Can't survive with air conditioning and that includes their "camper", which was for the most part non-existent when I was growing up. When I see young families at campgrounds in the forests it saddens me to see the dad hauling out a large barbie and lawn chairs and all the critical toys that the kids use at home. The parents take the city into the woods and miss out on most of what nature has to offer - if you are open to it. How can you hear the sounds of nature or smell the natural world stuck in an RV listening to amplified music or watching a ballgame? You cannot.
I also see a change in the suburban sprawl in this country where city officials allow large housing developments to be built with no access for kids to parks or to nature in the surrounding area. I could walk a couple miles to get into a national forest that forms the northern boundary for the LA basin in Southern California. Most kids would have to spend a day on the bus to get to anywhere to hike around and be exposed to nature. We have become for the most part a nation of couch potatoes with the bodies to match.