Don't give up hope yet!
Raze's link links to another page:
http://www.polygon.com/2014/3/24/5541856/rollercoaster-tycoon-4-pc-completely-different-ios
which includes this quote:
Chien also addressed "diehard" fans of the series who "want a PC experience." Atari is creating a game for those fans, he said, though the mobile version will arrive first.