I did, like most of you, I assumed, wrong of course, that most of that would carry over, but actually purchased planes did get ported over, and quite nicely as far as I can tell. I cannot vouch for airports, as I don't recall ever having purchased any.
However, I'm a bit miffed that I had certain planes (Yes, I'm looking at you, C700 Longitude...) that I no longer have access to until I fork out upgrade money for premium deluxe (again!).