I think (a), (b) and (c) above will mean that it will eventually happen in some fashion or other and I think (a) will be the deciding factor with (b) second and (c) a disappointing third.
because (a) will be required, (b) will reduce expenses and (c) has no bearing on "moving General Haig's drinks cabinet six inches closer to Berlin".
...that's assuming of course that future warfare will be between two superpowers or earth v aliens (well you never know). If it's between a superpower and a primitive opponent, well you could just as readily start producing Spitfires again
