Thanks for the post, Kilimanjaro!
Dutasteride, like other androgen blockers, is likely to reduce DHT, which can help slow or stop male pattern baldness. Its effect on body hair is not as well documented. Finasteride has a better track record, so it may be better to go with something tried and true. Generally, the doses needed to cause hair reduction in males can have unwanted side effects, so you need to speak with a physician before starting an oral antiandrogen.
The issue with body hair donor sites is the scarring after. When taken from the back of the head, this is not noticeable. Punch grafts taken from the body have been possible for a long time, but the issue has always been the pinhead-sized scars many patients have. For some this is worth having head hair, but the scarring at the donor site is often visible. Unless you have a lot of body hair at the donor site, you may have to deal with scars.
It will certainly be interesting to see where things go in upcoming years.