Laser hair restoration has come onto the scene in recent years, and reviews are mixed - even from physicians specializing in hair loss. The laser hair loss devices in physicians' offices resemble hood-type hair dryers, while you can buy over-the-counter laser brushes. The lasers used in these devices are "cool" lasers so that they do not burn the skin the way dermatologists' anti-aging lasers do.
Some hair loss specialists say that the lasers do promote hair growth similar to the growth produced by the drug minoxidil. Others say that while they don't prompt hair growth, they do encourage healing and better results from hair transplants. The main "risk" from laser hair restoration is the cost, because bad effects from it have not been documented.
Hair cloning is still on the horizon, but hair multiplication has shown promising results. In this procedure, hairs plucked from the scalp or beard are processed to separate the bulbs of the hair from the shafts. The bulbs are cultivated in containers. When the cells in the bulb have multiplied, they're injected into pores of dormant hair follicles in the area that is balding. If a technique can be developed in which stem cells around the bulging part of the hair follicle can be harvested along with the plucked hairs, this procedure should become far more successful.
As far as hair cloning goes, scientists have discovered that dermal sheath cells that are located in the bottom of the hair follicle can be isolated from one person and injected into the follicles of another person to cause formation of new intact hairs. The implanted cells interact with the recipient's follicle to stimulate the creation of normal hair follicles. If the dermal sheath cells can be multiplied in petri dishes and then injected in large numbers, theoretically a full head of hair could be produced. 
The exciting thing about this research is that dermal sheath cells have special immune properties, and the lower part of the hair follicle is "immune privileged." This means that there are not problems with recipients rejecting transplanted dermal sheath cells, even if they come from someone with a completely different genetic profile. Another exciting thing is that there is evidence that the recipient's own follicles influence the look of the hair so that it actually resembles the recipient's original hair more than the hair of the donor.
The use of a donor would not be necessary except in cases of complete baldness. But in cases of male pattern hair loss, the donor's own supply of hair from the sides and back of the head could serve as the source of the dermal sheath cells. The dermal sheath cells are what's known as fibroblasts which, it turns out, are among the easiest cells to culture in containers. Theoretically the donor area could serve as an unlimited supply of hair.