[jaypaulynice]

Uber succeeded because they can reliable predict demand for services. They have both historical data (rush hours, regular commute, etc.) and also future data (sporting events, concerts, night life, etc.)

I looked at starting an Uber for healthcare when it was getting hot, but I thought again about the problem. It's not possible to predict who will be sick when and where and doctors are very expensive. Having doctors go to people's homes is a lose lose situation because the time they spend driving is time they could spend helping patients.