It may come as a great surprise to many to learn that several airlines are already using GPS as a primary navaid for Oceanic operations (also in Europe on the RNAV routes), as well as many highend business jet users. 'Tis a shame that the Europeans have such a negative attitude, but hey thats OK....
The term second fiddle comes to mind with these folks.
The benefits of GPS far outweigh the small chance of any problems, IMHO.