Ann: 121 Tech Investment Conference Presentation-IOT.AX, page-54

Its actually a very simple design, counter-rotating blades with a low centre of gravity keeping the platform stable in mid air (similar to a helicopter design).

I have had many drones in the past and there is no reason for this not to work, small GPS keeps it vertically & horizontally stable within limits, most likely has a ultrasonic sensor on the bottom "object avoidance", the fundamental design is nothing new, just a new overall package