It looks like the platform was designed around a Segway. Ultimately, while the execution and development of the hardware is excellent, I think the logistics of everyday life will be the ultimate downfall of the machine. How does it perform in various weather environments? Will it require a trip back to the drop off depot after every single bag? Just how many robots are required to handle the amount of garbage generated every day in just a few blocks of the city? How does it deal with human interference enroute to the pick up/drop off point?

Seems like there are a lot of questions to be answered before I'm convinced it is a reasonable solution.