[xKingfisher]

They still have a number of issues.

* They're expensive (~4-8 dollars per follicle) with a single transplant being 1000-5000 follicles. Severely bald men may need multiple

* There is a finite number of follicles that can be transplanted.

* Permanent scarring in the donor zone.

The ultimate treatment would be either hair cloning (still a ways out, very expensive) or a way to reactivate the dormant follicles. Presumably if you could solve the latter you would become very rich very quickly.