I'd love to see a Aubrey Isle like processor based on ARM cores - with many ARM cores sharing a 2 GB pool of fast memory.
The Intel cores on the Aubrey Isle chip are fairly large and take up most of the silicon on the die. An ARM-based design would be much smaller and cheaper to manufacture.
Now that I said it, I wonder how much more expensive would be a RAM chip incorporating an ARM core versus pure memory. It would be interesting to have "smart memory" that could do things like "sha-384 this range and ping me back when you're done". Assuming other threads are not using that same component for other activities, it could be done basically "for free".