Not only the mini, I think a Thunderbolt Display with built in GPU will affect the bigger MacBook Pros as well. The 13" will draw more attention and the 15" sales will start to slip. Why get a 15" when you can have the portability and have the graphics.
Thats is exactly my point.
Business model based look - apple wont do that - killing part of more expensive macbooks sales and imac sales
BUT
Customer satisdfaction based look: great argument for apple to implement gpu intu TBD - that would make apples notebooks even more dominant - no other notebook maker will have this comparative advantage.. imagine, Apples notebook - ultra portable, long battery life and at home, almost desktop experience...
Hope apple will consider this and try to innovate once again...