I read about this report in the NYT. The motivation behind the study was basically to illustrate that not only will the obvious poor people in poor countries be displaced and otherwise affected, but that even the "haves" will be affected, by, e. g., this impending beer crisis. (Tell them their beer is going away, you've got their attention.) The researchers coined a term I kind of like for the likes of beer, and coffee, and other such products likely to be affected similarly: "luxury essentials." Meaning, you don't really need them to survive, but if you're rich enough to live in the developed world, you really do need them.