Well since...
we no longer get the famous "Braben Shots" anymore or "Brookes Shots" respectively known also as () and since RCT is close to being, if not, a dead platform, kept alive by the very scenerymakers the publisher or developer might have stopped from importing custom scenery, David sometimes throws the starving masses a clue to the future, or perhaps a bread crumb.
I guess when one is starving after being so loyal to a product, any crumb seems tempting and delicious, even if its old and moldy, it still is better than starving for any information you can come by.
Currently the way it appears, you have ThrillVille as the only 3DRCG (3D Roller Coaster Game) or 3DTPG (3D Theme Park Game) available, since RCT3 is dying a long slow death, and its very doubtful that an RCT4 will be along anytime soon. But the future is always changing, uncertain, to loosely quote one of ol' Georgie Boy's Star Wars characters namingly "Yoda" not Yogurt! Eeew what a horrible thought, a yogurt bar named Yoda...yuck!
One never knows where things will end up, and its my hope that there is an RCT4 and RCT5 and a ThrillVille for the PC, and that NL and VR merge to begin a 3DTPG, and most of all that the community gets its act together and makes their own game, something Braben has seriously dismissed, but I think may well happen and much to the dismay of professional developers and publishers. Because there is no price for raw determination and control of one's own future, especially when one or lets say, a great many, were so loyal only to be abandoned and ignored.
Example. Look at this one single guy named Jonwil. While the publisher of rct3 promised early on scenery importing and dev kind of reaffirmed it through misc. statements in the old Atari forums, they ignored the issue and their customer's, so this one single guy with (get this David Braben) "Tremendous Talents in Programming" figured out not only how to import custom made scenery but also animated scenery and many other things as well.
David, while Jonwil's success may seem trivial to you, I greatly applaud his efforts and talents and I'll tell you why. Because his efforts have allowed the RCT3 platform to stay alive. In fact the RCT3 platform has greater value and a longer life now than it ever has, even if the Publisher abandoned the userbase and the Developer won't fix certain, erhmmm, older issues that need fixing.
So like I say, where there is a way there may well be a will, and the winners in the long run may well be the users who were abandoned and the general 3DTPG marketplace. By having many resources for park builders like myself to build our 3D parks and model them accurately after the real deal, I don't care how, but I'll take whatever works.