Just thinking about how with minimal effort, S&S is able to predict stresses that are comparable to traditional FE packages. Now how cool would it be if it could (in the first instance) analyse laminar flow around streamlined bodies.
Instead of a solid model representing the structure, we now consider a solid volume of air. Restraints now comprise of zero velocities or ambient pressures at boundaries, etc. What will be really even cooler is if you could then transfer the predicted pressures from the flow analysis onto the structural solid model.
Although the physics are completely different and also the fact that Maxwell's reciprocal theorem no longer applies, the current mode of operation can be maintained but just have a switch from structural to fluid analysis.