While it is an interesting concept, putting rotors aside for more thrust on a helicopter is nothing new, robocraft players have been doing it since allways :D
Joking aside, the only drawback i see here would be stricter safety procedures when it comes to boarding and unboarding passengers, you wouldn't be able to just step outside of an aircraft untill those sideways rotors stop.
But other than that, it looks like a step in the right direction, I would definitely like to own one!
I liked the article, upvoted and followed, cheers!