NVIDIA Also Interested by External Graphic Cards for Notebooks

ATI/AMD is trying to develop a new market for graphic cards dedicated to notebooks, under the name of XGP. 

So far, those solutions were not really successful (performance and market wise). However, with NVIDIA also interested by the market, it could open doors for innovation driven by competition between both main actors in the field of GPU. In a recent interview, Rene Haas, NVIDIA Notebook GPU General Manager acknowledges that he company had project for this segment. 
If both actors could agree to use the PCI-Express port as a common and default entry point for their respective systems, it could push notebook manufacturers to include it in all their models, or at least mid-range and high-end products. This would increase the number of potential users.
It would be nice if Apple could offer similar system, giving more power for MacBook users when they are plugging their notebook to an external GPU for desktop work, while saving on the battery lifetime when on the move.