Have you used it? From what I can tell, they are servicing areas remote enough that they may not even have Uber Eats. Even if they do, the time it takes for a car to navigate roads and reach you will be many times that of a drone that can fly over a hill and cover hundreds of metres of challenging terrain in about a minute.

I am sceptical about whether this has applications within a busy city (buildings become a problem and safety becomes a concern) but I think they're going to be perfect for areas a bit outside cities where deliveries don't exist or the quality of delivery service isn't so good.