Take a luxury and make it a commodity. It works the other way, too. Water is a commodity -- a commodity which is, essentially, free at the margin -- that is also a multi-billion dollar business in the US. Much the same could be said about food. (I am about to step on some toes. Turn away if you're easily offended.) There are entire industries which are designed around the proposition "You are too good to consume X. P…
Or iPods, really.