How practical is a 13 lb laptop if you fly around to 3 different cities every week? What if you want to use your laptop on an airplane?
For me, I need a laptop because, well, I need something portable. If you want something that is just a bit bigger, but you can put anything into it, and upgrade it easily, consider a SFF PC. There are many to choose from and you can customize your peripherals just like a desktop....and slowly upgrade them when you want. They are about the size of 2 shoeboxes stacked on top of each other - some maybe 3 shoeboxes or 2.5 shoeboxes plus monitor.
Granted, there are extra cables. In my experience - as I did live like this in 2004, it takes about 4 minutes to set one up including locking it down with a cable in a hotel room.
they make carrying cases for them too. And I will personally attest that your 17" LCD will make it in a suitcase with a carrying case surrounded by clothes just fine.
I consider a "laptop" like the XPS2 to be a kludge for a small, tiny, niche market, who maybe doesn't want to take 4 minutes to set up a SFF and pack an LCD into a suitcase.
A "laptop" using the definition that the rest of the world needs - an actual easily portable device - is not going to be able to play Doom 3 at WUXGA LCD with detail maxed out. It's not supposed to. It's not going to. There is no hope that it will. Because of heat, current, power, there is no comparison.
With that in mind, the fact that the 9700 can run TODAY's games including HL2, as well as it can, and will continue to run TOMORROW's games well, make it a very valid GPU and it is NOT outdated.