I know this is a dangerous game to play, but what of the future?
I am intrigued by the idea of true optical computers,
perhaps the $10M super-computer will return?
GPUs have definitely taken over in some areas - even where
SIMD would not seem a good fit. My previous employer does motion
estimation of realtime video and has moved from custom electronics
and FPGAs to using off the shelf GPUs in PCs.
-Steve