Uber’s experimental food-delivery service is finally ready for a full-scale launch in the United States, and that should make GrubHub extremely worried. Known as UberEATS, the new service will be expanding to ten major cities (Atlanta, Austin, Chicago, Dallas, Houston, Los Angeles, New York, San Francisco, Seattle, and Washington) by March, according to the Wall Street Journal, and just the news of this expansion was enough to send GrubHub’s stock to an all-time low, and for good reason. Uber is a soon-to-be $62.5 billion behemoth, which means that it can be a serious threat to any company whose territory it encroaches on.