I think that's an extremely optimistic way of looking at things. I'd say without any real doubt that Magoffin, Geeves, Harris, Hopes and Swan have next to no hope of being Test-class bowlers, probably ever and certainly at the current time, and that Cleary and Cameron are less likely than more to be.
Australia currently have Clark who is almost certainly still Test-class, Johnson who is top-notch, Siddle who is very promising, Hilfenhaus who is promising, Lee who might still have a bit left in the tank but might be finished, Tait who there's no knowing what'll happen with him, Bollinger who might have something to offer but equally might not, McKay who seems vaguely promising, and nothing else which gives-off the suggestion of being Test-match material.