The question is really: how are we going to benefit from the 10GHz, without a matching CPU bus? It's probably technicly possible to attach a 1GHz CPU to a 386 motherboard, but what's the use?
Don't say cache, because almost no amount of cache is enough, you'll run out at one time or another and the CPU suddenly execute instructions at bus speed. Or move data at bus speed. If they manage to create a 1GHz motherboard/chipset to go with it, then it would rock seriusly..
...and no-one would be able to afford it =)
