so if the MBP won't have a new design this summer, when will it be redesigned?😕
Simply put: when new technologies become mainstream to allow a design change.
The simpler and smaller (less heat) Montevina chipset could be such a technology change, but perhaps it's not enough.
Perhaps Apple is waiting for CPUs to get even smaller with Nehalem. (first half of 2009)
Yet there are other components that could be considered:
LCDs will eventually be replaced with 1mm thin OLEDs. Imagine changes to the screen possible with that! But 15-17" OLEDs won't happen until 2009-2010 at the earliest.
But once the screen is 1mm thick, which is probably too thin for a lid (bends too easily) how about swapping the traditional HD for thin flash memory banks mounted behind the screen. The screen could then be 3-4mm, still thinner than today, but you save the whole space now used by the HD. I could see that happen in late 2009-2010.
With the HD gone from the bottom case, one can imagine reducing the thickness of the base.
Although Superdrive heights will always be a limiting factor. I don't really see those drives to get much thinner than today's 7mm and I don't think those exist in slot-loading versions yet. Let alone Blu-Ray.
But once they do, expect a redesign. Depending on Blu-Ray availability probably late 2008-late 2009.
Their current slot-loading Blu-Ray drive is 12.7mm which I think is thicker than what Apple uses currently, so not yet suitable.
From all this you can see that late 2009 - early 2010 seems like a good time for an over-all redesign. That's 1 1/2 years away. Until then changes will be minimal, because current parts don't allow for radical redesigns.