Ford's Automatic Door Opening System

Looks like Ford is working on making making it easier for its customers to step into a Ford, literally. According to this patent application, Ford has developed a system where sensors in the car detect the presence of a key fob in the pocket of an approaching owner. Once the owner reached a pre-determined distance, the doors automatically unlock and a spring-loaded mechanism pops one or more doors open. Sounds like something a mom that often carries groceries and a two year old would appreciate. An image from the patent is reproduced below.