Indeed, Uber already has their UberEATS program where they offer home delivered food from restaurants that don't yet have their own delivery service. So they're already experimenting with providing delivery & mobile payment processing services.
I'd be interested to see how UberEATS turns out. Deliveroo has had a year on them, and at least where I am I think the latter is still the favourite.
Yep - much bigger fan of Deliveroo, but whilst UberEATS might fail, could almost see them being more of a delivery API and last mile brand than the full restaurant service stack.