The first problem is that self-driving cars could make many people jobless. Drivers of trucks, buses, and even taxis would no longer be needed. The second problem is that the technology is not yet good enough to ensure safety.
I would like to have a driverless car in the future, because I would be able to sleep or read a book on my way to work.
In the future, I think I'll still take a bus or subway to go to school because it's cheap and eco-friendly.