If you don't mind an opinion from the amateur user-end of the equation, i
think the time to do it is before they expect it. If you wait until the
public is socialized to it, that means you missed the boat. The future has
always belonged, and always will belong, to the innovators, not the
copycats. To be perfectly honest, i DIDN'T know you could do that. Which,
as a potential customer, denotes interest on my part, rather than incredulity.
I say do it, do it now, and do it big.
*** "Save the whales.....Collect the whole set!"