I think I may have found a partian answer...
From the Stream Processing FAQ: [quote]Q: Is stream computing a return to the old co-processor days?
A: In many ways stream computing does resemble the days when vector co-processors handled substantial mathematical tasks. The benefit then as now is the remarkable performance boost gained through implementing these specialized components.
We fully anticipate technological advancements as well as programming techniques to pull these co-processors closer to the CPU over time until, as with earlier co-processors, they disappear into the CPU itself. [/quote]
Is there any information available about the progress of this?
Yes, both AMD and Intel are working now on their CPU+GPU integrated products under these codenames: Fusion (AMD) and Havendale & Auburndale (Intel). Besides, there is another project Intel working now, Larrabee, but little people knows what exactly it will be: CPU, GPU or something between them.