Microsoft already makes a ton of money from Android.

The answer would really depend on the nature of the problem. If you are doing more statistics type processing then R is commonly used in academia. Python might be good in the short and medium term, but you will probably want to get acquainted with C++ if you are serious.

The story makes it sound like there's no support for Fortran in MPI but there totally is: https://computing.llnl.gov/tutorials/mpi/ I recognize that some kind of abstraction layer in a support library on top of MPI might be useful, but let's call it what it is.

I'm holding my breath!