Some gray subs ther now.
It is my understanding that Allergan is in clinical trials for this very thing. We won't know until those are completed if Latisse will be a new cure for poor hair growth. It won't resurrect dead hair follicles, so any improvement would be seen on the hairs that actually are viably capable of growing. If you are not opposed to doing your own testing, you could try it. If it works, let us all know!!
It is only approved for use along the lash line but I have heard anecdotally that it does work. Depending on the area of the bald spot it may be cost prohibitive to use it for this purpose.