According to the study, it's not so much that more people got fat, it's that fewer people are smoking. A lot of comments here missed this I think.
The study is suggesting that we've reached a point where these two lines have finally crossed, which we probably could have anticipated coming sooner or later.
That the most salient recent observation is a change to the prevalence of tobacco-attributed disease doesn't really change what it means for obesity-attributed risk to finally overtake it. That wouldn't have even been fathomable 50 years ago and the trendlines confirm exactly what needs urgent attention now.
According to this study, sure, but countries, like France, with double the smoking rate of the USA still don't have double the health issues associated with smoking.
I'd like to see a simple bar chart with, for each country, a bar displaying smokers as a percentage of population and a bar displaying heart-disease/cancer/diabetes/whatever[1] as a percentage of the population.
My understanding right now is that countries with (for example) double the smokers still don't have double the health problems. Some may even have fewer health problems even though they have more smokers.
[1] Basically, all the diseases that lead for smokers.
Most people mistakenly think that the world is getting worse.