[matwood]

I think you're right in a traditional fast food sense (McDs, Wendy's, etc...), but there are a lot of sorta fast food restaurants around now. I'm thinking a Chipotle, Noodles, Panera type of business their customers could make use of ordering from a phone.

[Johngibb]

Chipotle already has an app that lets you order your burrito directly, pay from the phone, and skip the line to pick it up.