It would be interesting to see if they have "solved" the software and design engineering problem of VTOL, transition from vertical to forward flight, and GPS+Glonass guided drone like operation, but the bottleneck to implementing it is the problem of the batteries.

In which case the whole design will need to sit on a shelf for 5 to 10 years until some radical change in Wh stored per kilogram of battery comes along. The density of 92 octane petrol, aviation fuel or diesel fuel in terms of kilojoules (or watt hours) per kilogram is still ridiculously higher than the best batteries.