did you even bother to look at the specs of that particular card first before posting that? that's a dual-gpu card, hence the SLI in the name. it's two cards on one chip to save space.
a notebook graphics card isn't like a desktop graphics card. a 9800M wouldn't be dropped in like a 9800GT would be. it'd either be integrated onto the motherboard or installed directly from a factory. laptop graphics cards fall under the same pricing distinction as good agp and pci only cards do - if you need it, you've gotta pay a premium for it. hence the 1k pricepoint.
edit: neblix, what i just said applies as well. yeah, the 260's better by a little bit...than 2 9800M cards. of course it'll only be a little bit in that regard. also, like i said above, it's not a desktop card. what looks like a minimal gain is extensive for a laptop because of the limited heat profiles and power capabilities. 10% more performance isn't much in a desktop but is light years in a laptop. same goes with the cpus (also, like i told you in that email, ghz isn't everything. manufacturing processes, heat profiles, FSB...).