It's a big opportunity for Mexico, then. Already home of the most cost effective first world (OECD) universal health care system, Mexico has good facilities right on the US border in half a dozen cities and is popular for eye and dental procedures for US visitors already.
That's not actually true. There's tons of price pressure, but it all happens behind the scenes, and in a way that's invisible to patients.
The way payments are structured, downward price pressure on suppliers may even correspond to an increase in the (apparent) out-of-pocket cost to patients. That doesn't mean that the overall amount that the manufacturers are getting paid isn't decreasing, though.
The market for computers 40 years ago was far from obvious. Even 25 years ago, most people weren't really sure if this whole internet thing was going to amount to much. 15 years ago, people scoffed at the idea that the future of the internet was mobile phones.
Predictions are hard. Especially about the future.
Some way of treating obesity with gene therapy would be a blockbuster financially, but biologically we don't really have that worked out so much.
(research is ongoing: https://en.wikipedia.org/wiki/Sickle-cell_disease#Gene_thera... )