I don't understand the discovery comment. I don't discover Bob the copier salesman. I decide I need a copier, search for copier retailers and then give Bob a call. Won't bots work the same way?
You don't have to discover how to call Bob, which is analogous to finding the bot. But you may need to discover what jargon to use with Bob to make sure you get what you want.
Depends on which vision wins out. The phone handset vendors certainly have a leg up on being the "discovery" part, deciding which copier retailers you get exposed to.