I don't know if we're going to get better or worse, but one thing's for sure: we're preparing for worse. Just look at all those infomercial products that help us avoid the unnecessary toils of sitting up in bed or bending down or picking up our lap dogs to put them on our furniture. I think the best example I've heard of America preparing for worse comes from Disney World, the Mecca of American consumerism. I read that Disney World has had to renovate their famous "Small World" ride because, as a nation, we're too big for it now. The Small World boats, weighed down by heavier Americans, have frequently gotten stuck, essentially becoming artery blockages that slow down the already interminable lines to the ride. Because of this, Small World is going to have a deeper flume and redesigned boats.
Disney World's solution to the Small World problem epitomizes America's approach to fighting obesity. Like Disney, we don't do anything about the cause of obesity, which is, obviously, caloric intake. Instead, we use medical science and novelty products to increase our capacity to abuse our bodies. But if we keep targeting the effects and not the cause, we'll only become better at accepting the problem, no matter how much worse it becomes, and we'll just have to keep on renovating.