As far as I'm aware, there are stem cells in the scalp, but you're right,, I'm wrong, they aren't pluripotent, but can be induced to be as you mentioned. I'm no expert, but as far as I know they are somewhat differentiated, but not fully, and are capable of forming multiple types of cells within the skin including the necessary hair follicle components. I don't think there's much of a danger of them forming cancerous cells via the wnt pathway targets previously mentioned. It's very unlikely that they could induce adult somatic cells into becoming undifferentiated cancer cells really.
It doesn't really matter though, as far as this announcement is concerned, the idea that they have solved the issues related to hair follicle cloning is very unrealistic, and the idea that they even have the necessary laboratory to take and culture the cells to be induced to form hair follicles is also highly doubtful. A very brief glimmer of hope as usual, but we literally have no reason to believe them, neither evidence nor logic.