Long term dud. The changes going on with AVs and drones pose a real risk to Uber. If they do not materialize, however, there is another change that will eventually come, and I'm not sure who wins. The cost of delivery services is too high today, in my humble opinion, and I think it can be greatly improved with better logistics and enforcing a time of delivery by the restaurant and receiver for routing. For example, if there are 10 restaurants in 1 block, there can be a delivery to a specific neighborhood from all 10 of those during peak hours. The car leaves at a specific time, arrives at a specific time, and the delivery cost can come down dramatically because you didn't force a car with a driver to take 1 pizza box from point A to point B, but maybe 5 pizza boxes, sharing the cost more widely. Railroads went through this and called it PSR, and it made a positive impact in terms of on-time deliveries and managing costs/margins and making it accessible (vs. trucking alternatives) to more and more use cases.
I don't think either Lyft, Uber, or others have really tackled this and in countries with a high labor cost, I think they should have already begun such initiatives to bring the cost per delivery down.
But all that effort is pointless if they get derailed by drones. A drone is inherently more able to do point A to point B deliveries, in part limited by what it can carry, and it does not have (eventually) as much labor cost as a car. Drones can also be owned by the vendor.
Transportation businesses, like Uber and Lyft, are just too difficult to make a call on, but I think the deck is stacked against them right now. At best, it gets a "pass" from me, but I'm also just not interested in things with so much long-term existential risk. I might be more tempted if I saw one of them making leaps on efficiency via logistics, getting costs down further than other options though.