Still, by opening the UberRush API to developers, Uber has taken the first step towards expanding its courier service. Companies can now add on-demand delivery services to their apps with just a few lines of code. Companies like Nordstrom and 1800flowers have been using the program since January, and Uber says more partnerships are on the way, including Dryv, a Chicago-based dry cleaning delivery service and Up Sonder -- a company rents on-demand drones to aerial photographers.

If UberRush does well in its starting cities, it's likely that the company will expand the program to other towns with active Uber drivers -- which means we're all one step closer to never having to leave home again.