There are some serious efforts to port Torque3D to various other platforms.
Learn more about it here:
http://www.garagegames.com/community/blogs/view/22557
The guy behind the porting effort seems to be interested in RotC too (he donated to the campaign), so I guess we will see a port to all these platforms at some point.
Concerning the Android/SteamOS port: Any good ideas how to make RotC playable with controllers?