Great read indeed.
He doesn´t mention it but the massification of tilt-rotor, if paired with the emergence of a supersonic, would probably see the decline of the Business jet as we know today (at least some of them).
Let´s Imagine that we have long range supersonic airliners with open airports all along the continent´s shores. Why would you transfer from a Mach 2 airliners to a private subsonic jet and then to a helicopter when you can greatly simplify your journey, in most cases, at a lower cost, hoping directly into a tilt-rotor? Even if the jet can theoretically fly 2 times faster, for a 1000km distance, factoring holding, takeoff&landing and aircraft transfer, you will get to your destination faster with the tilt rotor direct journey.
Hence, the choice for CPL holder will stay the same: fast jet/aircraft or slow rotorcraft. It´s the Rotorcraft itself that is evolving to be a faster machine and extend its reach with the same infrastructure and the same pilots. IFR is only a qualification at the end.
Leonardo probably did factor all this for us when designing the cockpit for their 609.