Yeah, I don't really see it working on iOS/Android/Windows Phone mainly for technical reasons. Sure, it might be cool for someone to just whip out a smartphone and start playing FH with people but there's alot to consider. For example, how will the game control? How will you move and see chat at the same time? Will you have to constantly switch between looking at characters and looking at what people are saying? Even with a 1080p screen, 5.5inches isn't much room for having both open at the same time. Not to mention other problems like cross platform compatibility between the devices.
There are solutions to making OGRE, the game engine that FH runs on to work on mobile devices like this:
https://github.com/gamekit-developers/gamekit but like Acrylics said, without the game source code there's no way you're going to get it to work. Not to mention having to rebuild the game from the ground up in the respective languages that each device uses since its not just as simple as bundling Wine like the 'mac' version of FH uses to make it work on OS X. :c
Edit: Not to mention how piss poor the game is right now when it comes to having more than 10 people on screen at once. I mean its a great case of why multi threaded support is needed. But OGRE isn't exactly the best engine to go with anyway. But normally companies like Apple have strict guidelines on how the game should perform on a device. Like making sure it runs at 30+ FPS most of the time and not drawing all the life out of your battery in less than 10 minutes.