From all I've heard, stem cell hair transplants are just a matter of time...and short time, at that.
Lots of money to be made there, no doubt.
More money to be made in a "cure" that only works as long as you keep taking something every day. Rogaine was awesome in that regard. Even better, it really only works if you take if before you go bald, so better take it while you have a full head of hair, just in case! Brilliant marketing!