I am not sure, if this question is relevant to the forum. But as a Geek, i must place mu thoughts on it.
I believe not anytime soon, reason being "not what MATLAB does and who else can do it" but who actually uses it. For straight-up numerical computing, the kind that fluid mechanistic and signals & systems engineers do, Matlab is unlikely to lose ground anytime soon. But the competitions from other open source like : "R tools, SciPy or for that matter Octave" is real but not immediate.