Tomorrow's Yesterday

I've been thinking about writing a short fiction having two main characters meeting at a café every day for one week, with their conversations based on the pros and cons of the technology of Watches that people use in their time.

Watches are bands that attach to a person's skin. It tracks people's movements and location like a global positioning system does. Watches could be used as a computer, a phone, a music player, a recorder, a camera, and a map.

One of the main characters, a man, works as a security guard for the Watches company, while the other, a woman, is one of many leaders of the national resistence to Watches group. They don't know each other's occupation though. They meet when the man accidentally knocks over another citizen, causes a scene, and the woman comes in to break up the argument.