Things like GPUs and Parallella are great, but it would still be great to have an open FPGA architecture. Some problems don't map all that well into a GPU, but would be fairly simple to map into an FPGA to get huge performance increasese. Also, a GPU comes with a computer and that tends to be large and power hungry. Often times an algorithm can be implemented in an FPGA which can run on 5W and fit into a package the size of a deck of cards.