If you can manage to write a Windows game and then a Mac port or an Android app of it, then chances are you can target any platform you like as easily as anything. If you didn't, the problem isn't lack of tools to do so.
And one of these problems is input, which is probably the biggest practical difference among a PC, a console, and a "mobile" device. For example, even if you can port your desktop game's game logic, graphics output, and audio output to Android, that doesn't mean the resulting game's input will make any sense unless you're on an OUYA. I tried playing platformers in an NES emulator on a Nexus 7 tablet, and pretending a flat sheet of glass is a gamepad is not fun. A Steam Controller will probably handle like a Triax Turbo Touch 360 given the pictures I've seen of it.