So, why would the MBP be best with a socket? Simple. The next revision of the MBP, being the Santa Rosa revision, seems to be mostly improving everything BUT the CPU, which only gets a very, very small bump. The revision is still great however, because of all the other upgrades, being possibly either or both LCD backlit and very high res screens, flash booting, faster bus speeds, and of course, the big one, in all likelihood there will be either a Radeon X2xxx or Geforce Go 8xxx GPU for insanely fast mobile graphics power. Conversely, the MBP upgrade at the end of the year will probably be almost exclusively focussed on the processor. It is obvious that Penryn will be amazingly fast. Intel has said that the new Hafnium material they use improves the characteristics of the transistors five fold. I would imagine that this could mean Penryn reaching speeds of 4Ghz or more, while using under half the power. Or any combination of power savings and speed. So, basically, Apple should put a socket in the Santa Rosa MBP, instead of just soldering a Merom to the motherboard. This would enable people to buy a Penryn CPU, maybe even quad core, who knows, and put it in their Santa Rosa MBP. I would guess that Apple won't do this, because the socket will be hard to fit in the MBP, but considering the absolutely massive power advantages of Penryn, this would be an excellent selling point of the new MBP. True, it would impact Apple's sales in the future, but considering the platform will be replaced, and sockets changed, the MBP will probably only be compatible with first or maybe second rev Penryn CPUs, limiting considerably the effect of people upgrading instead of buying new. I think a user replaceable CPU is far more important and likely than a user replaceable graphics card. Perfect example, iMac.