I had the same thought when I first saw Uber. "I have the number for XYZ taxi/limo service programmed into my phone. What's so special here?". To the vast ma

I had the same thought when I first saw Uber. "I have the number for XYZ taxi/limo service programmed into my phone. What's so special here?". To the vast majority of people, a better interface for doing something they already do is itself a killer app. Ask a teenager how often they email their friends. They'll laugh at you. Why? Because Snapchat and Instagram are better interfaces for communicating the things they want than traditional email. Talko is arguably a better interface than most professionals use for many aspects of communications, so they have at least a reasonable chance of success.