interesting topics: SIMD and DSP in modern days...
I read that AmigaOne X1000 have XMOS xCORE chip (and XMOS have some roots in Transputer era 
is there any practical use of this chip or any demo that would show possibilities of xCORE?
btw IBM Cell looks like DSP: SPE's has it's own memory, no cache...
Although I did see a cool scrolling Super Mario demo the xCORE is aimed more at I/O operations.
One of the best projects I've seen, and experienced, was Randon International's Rain Room. It's used sensors and valves controlled by an xCORE processor to create a corridor of torrential rain that parted around you as you walked through it.
With the X1000 and X5000, it is only really likely to come of use to people with the skills and need/desire to create something with it, and whether or not that would result in something that would be of interest to the average user is another matter.
I can imagine that if the guys who used Amigas at NASA were still there it might be something they'd be interested in.
The main thing going against it is that the small userbase of A-EON hardware limits the chances of someone creating something really interesting with it. The other problem is that so far it hasn't been demonstrated that an xCORE chip connected to the CPU local bus has any advantage over one that isn't.