You can get an external monitor, yes, but its starting to need two DVI connectors fora reasonable refresh rate, which laptops typically don't have. Or, I'm not aware of any which do. Does anyone here run a high resolution panel from their laptop already?
I don't get the "too high" resolution argument. Sure, people said that at the time when 1920x1200 came out. But that was three or four years ago and, as I said, people who want and need that sort of resolution have had time to get to like it.
My old laptop has 1920x1200, which is just the widescreen 16:10 version of the even older 4:3 1600x1200. Its pretty sad that threee years on when its time for replacement, its not possible to find something better - and fairly hard to find something that is even as good.
As to the physical size, its not like you would need a 30" laptop.
Hmm lets see,current one has a 17" screen:
1920^2 + 1200^2 = 5126400
2560^2 + 1600^2 = 9113600
17 * 3018 / 2264 = 22.6
Okay, maybe the world is not ready for a 22 inch laptop. Need to wait until programs are more scalable and designed for a wider range of pixel densities.