Well, on the idea of performance for value, the hardware is probably fairly placed for the money, cause probably woud cost more for more, or to do more. In terms of gaming, its hard to find one with the idea of two screens anyways unless you find the interest of course, but probably hard founf against just a company release. Like im sure a GTS 250M is still twice as fast as my computer alone almost. Maybe more towards Graphics side of course, but it. Would be able to run some intersting games twice over.
Battery life yes probably the one issue of it all, of course, but still. Laptobs i dont think are the same, hence the GTS 250(m) rather that mtters or not, who knows. Could just be there for something different.