On Tuesday, Uber announced a pilot program for what it calls Uber Corner Store, a service that would allow Uber users in the Washington D.C. area to get staple items like toothpaste and bandages delivered from local stores. According to a blog post, the program will only last a few weeks, but it hints at CEO Travis Kalanick's long-term vision for Uber, which is to transform the company from a pure transportation play into a full-fledged logistics company.

Uber has never been one to back down from a fight. Since its earliest days, it has wrestled with regulators and fought dirty with competitors like Lyft. But all of that may be child's play compared to what could come next. With Corner Store, the five-year-old startup could be setting itself up for an all-out war with two of tech's superpowers: Google and Amazon.