Similar for social things. I need to coordinate movie tickets, dinner reservations, or tennis courts not just with the supplier but with my friends.
A generalized text interface for consumers would have to be not only as good, but noticeably better in order to create some monetizable advantage.
If this arises, I’d expect it to come from an existing body of users (Siri/Alexa) encouraging suppliers (Uber, OpenTable, DoorDash, movie theaters) to build towards a common API. Without that pump priming with tens of thousands of local users already on the platform with money to spend, it’ll be hard to gain traction I think.