Isn't the same thing possible with almost any language?
Of course this is the case for C/C++. And basically all other native languages for systems where you have some libc-like interface. And then there is Java which should also run just everywhere (I don't know about Xbox360, though). And basically all other dynamic languages which have some native implementation would also work just everywhere. Most dynamic languages also have some sort of GUI framework, sometimes a common one for several systems, sometimes a separate one for each system. And even if not, most languages still allow somehow to just use the system GUI by using the native C interface.
And if you thing about LLVM, you can make almost every language work anywhere also, even if you really only have JavaScript, JVM, .NET or whatever available. (Actually, I haven't really looked at LLVM->JVM/.NET translators yet but I am quite sure that this is doable and probably also already done.)
It isn't about the language in this case, it's more about the implementation of a consistent framework. The GUI will obviously change from platform to platform, but the .NET framework (for the most part) works on all of those platforms. That's a pretty big group of patterns and reusable idioms.
Java is also a no-no on iOS devices due to its JIT model. The .NET stack gets around this by using AOT compilation, so the entire .app is native code yielded from the JIT process (as I understand it). No reason something similar couldn't be done for Java, but as far as I know, it hasn't been.
Developer experience from top to bottom is the win here, I think.
Of course this is the case for C/C++. And basically all other native languages for systems where you have some libc-like interface. And then there is Java which should also run just everywhere (I don't know about Xbox360, though). And basically all other dynamic languages which have some native implementation would also work just everywhere. Most dynamic languages also have some sort of GUI framework, sometimes a common one for several systems, sometimes a separate one for each system. And even if not, most languages still allow somehow to just use the system GUI by using the native C interface.
And if you thing about LLVM, you can make almost every language work anywhere also, even if you really only have JavaScript, JVM, .NET or whatever available. (Actually, I haven't really looked at LLVM->JVM/.NET translators yet but I am quite sure that this is doable and probably also already done.)