Well read some of the other posts in this forum and you'll get more info than is possible to take in.
In terms of processor cores here's what's coming
P4: at present we have Northwood CPUs, next up is a core called Prescott, however this will still be called a P4
AthlonXP: At present we have Thoroughbred cores, next core will be Barton, and after that we have the next generation, K8 chip, Clawhammer, which will be re-badged as Athlon too.
read some other posts and you'll get the technical specs of these upcoming cores, as well as a whole load of hype, FUD, and bad rumours
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