Correct, the Mac Pro does not have mainstream appeal. It's a workstation.
Except it's a complete solution.
What we're seeing here is a bad gimmick.
says you. If it came from Apple I can promise you that you would be singing its praises.
This is clearly designed to allow a laptop to function more as a work station. Sony knows it will be a nitch market.
It allow the computer to be portable with out having the weight and power issues of a high power graphic card. These means lets say you are someone who needs a graphic card at work but still have to go off and go to meeting and what not.
This allows you to take the laptop to those meetings with out the punishment of the weight of the full power graphic card but at your desk full power.
Also removes one of the largest issues with laptops is heat and power. Putting the graphic unit out side of the computer that gives you a lot more room for cooling and you can run it off external power so that is a non issue. Kills 2 birds 1 stone.
I honestly think it is a pretty good solution to take advantage of switching graphic cards that we have seen on computer were intel can flip between intergratic graphic to deticated graphics as needed.