This idea was inspired by Darko's idea to Convert a car into a mobile office to earn money driving clients around during the day, and live in it at night
It would simply be to combine already existing services for transportation, goods couriering and food delivery into one all-encompassing service. This would provide the drivers with more work opportunities and perhaps even work out cheaper as there would be less movement by the vehicles that aren't part of a "job".
It would work on the same design as something like Uber, but apart from just transporting people, you could also request drivers to pick up and deliver food or packages. I know many drivers already work for more than one company in order to cut down on their off time, something like this would simply provide them with more options.
Another advantage for the consumer would be that you would be able to have food delivered from places that do not usually make use of delivery services, you'd simply phone in an order for pick-up, and the driver would collect it and deliver it to you.
This service would also fill a gap in the market for short distance couriering. If you have to send a parcel to someone nearby, but you don't have the time to take it there yourself, but also don't want to go through the hassle of a courier, you'd essentially simply order an uber for the package.