You could do shading for a major motion picture firm. If you look really in depth into OpenCL, it's being used for more and more. Not the least of which being virus obfuscation :X. GPU's can run circles around CPU's for encrypting files and hiding them from view so a new era of highly advanced encrypted viruses is around the corner.
So... you could get viruses even better.
The OTHER implication is that as OpenCL is more widely used, it can do some pretty sweet shit.
One possibility is SQL select statements. If you have applications running high volumes of them you can get a 20-1000% increase in productivity under load for database applications that are heavily referenced.