I'm not sure, I suspect that the case with Intel is that they have a very structured plan all the time for their next few years ahead (they seem like that kind of company). So, with that assumption, it wouldn't be unreasonable to think that they already have prototypes of much more powerful CPUs waiting behind the scenes to be released in X years time while they continue to make sales on their current processors within that X year time gap. Therefore, I'd imagine that if AMD released something which threatened Intel's performance in the CPU space (which I doubt anyway) then Intel would immediately act to bring about an earlier release of the more powerful processors they have prepared.