External graphics card box

Does anybody know if external graphics have made any leaps forward recently or is it still a dead market?

I have a laptop with a 9600gt in it which is ok but for Arma 2 and the like I am after a box that just plugs into my express-card slot and inside I can put whatever graphics card I want (which will be a Nvidia 295gtx ). This seems totally do-able yet no-one seems to do it.

Are there any products out there like this (or on the horizon?)

Even if you could use a gtx295, it would severely bottlenecked by your slow processor speed. In fact Im sure it would bottleneck something like a single GTx 260.

If you read the article you would see it would be hugely bottlenecked. Tom's tests showed that a X2 7850 @2.8 was bottlenecking a single 4770, which is less powerful than a 4850. Now I understand a 2.8 C2D is faster than a X2 @ 2.8, but you can clearly see it would bottlneck any fast single card, let a lone a dual card like a GTX295.

http://www.tomshardware.com/review [...] 81-12.html