I sincerely hope that if they do port it from the iOS version, they don't do a half-ass job of it.
I'm talking to you, Super Meat Boy. Not everyone has an Xbox Controller.
The iOS worked since the original game had a touch screen function, which most likely helped the transition from the eShop to the iOS quickly.
However, because of it being a PC Port, they might have to pull a Sega on this one. I remember the Sonic & Knuckles Collection port, since that one had the traditional "window view" play mode, which could work for Risky's Revenge.
And they might have to make changes to the pause menu (re-assinging the item menu as the pause menu, etc.) since I'm not sure how they'll transfer the touch-screen commands, most likely via tablet. Then again, the game is rather fast-paced, which could be a problem.