I agree, I can't imagine a portable with the power of my workstation. And I need that power along with the multiple large flatscreen displays to do my job efficiently.
I design circuit boards and the enclosures for them all as a solid modeled assembly. Massive power is required to handle the multiple heavy graphics programs involved. My 3.4Ghz Quad core w Dedicated Graphics workstation card is being upgraded this year for more CPU power, RAM and Graphics capacity. Because it can no longer handle the load. Portable? You gotta be dreaming.