[CoffeeDregs]

This looks a bit like the old (2000s) work of Leopard Logic or Tensilica. Exciting stuff.

One important note (based on some comments here): generally, these in-CPU FPGAs have very fast reconfiguration. Not sure if it's 1, 10 or 100 cycles but it's not milliseconds. Actually, (in past examples) configuration might take milliseconds but it would load a number of planes of configurations: plane 0 might be MP3 audio device; plane 1 might be MPEG2 video device. Then reconfiguration is: switch to plane 1.

This AMD proposal looks like it's much more tightly integrated into the CPU so it's got to be even faster. Combine that with the deep knowledge of processor internals you'll have to have to code for this thing and I'm having a hard time seeing you and me having much luck tinkering. This is probably 99.99% data center with gnarly NDAs and field support.