hair re-pigmentation with melanocyte transplantation

[incognito]

I saw this experiment about gray hairs re-pigmentation into black hairs with melanocytes transplantation into gray hair follicles(https://www.researchgate.net/publication/276491822_Treatment_of_Gray_Hair_in_Vitiligo_Patients_by_Direct_Melanocytes_Transplant_Using_Needling_Micrografting_and_Dermabrasion_Techniques) and also found another article about this experiment(http://www.odermatol.com/odermatology/20162/11.Follicular-SharquieK.pdf) in which I saw the following: "In cases of gray hairs, the grafted melanocytes will move from regimented epidermis into the outer root sheath then move down to reach the hair matrix thus inducing pigmented hair" . So basically it is possible today to transplant new melanocytes into gray hair and restore its color?. maybe it isn't a practical treatment for gray hair right now(cause of the use of skin grafts) but what about the future?, I know that scientists managed to create Melanocytes from Induced Pluripotent Stem Cells and actually used them to induce skin pigmentation in a nude mouse skin in vivo so can they use those melanocytes to induce hair pigmentation by having the melanocytes move into the hair follicles just like in the vitiligo experiment?. 

Edited August 23, 2018 by incognito