Dell just presented the new “Alienware” laptop, equipped with GeForce GTX 260M or optionnally GTX 280M, that may be a beast for 3D and CUDA too 
In fact the GeForce GTX 260M & GTX 280M are just re-branded versions of GeForce 9800M GT/GTX, themselves being just re-branded of the good old GeForce 8800!!! (I own one on my desktop and appreciate it)
Instead of 200 to 240 Scalar Processor, you end up with 96 to 112 SP at a lower frequency, wrose you will end-up with a CUDA 1.1 device instead of a CUDA 1.3 and finally you will pay for the re-branding on GTX 
CUDA 1.4 adds double-precision floating point and some other instructions that may be usefull mainly for thread communication (to simplify). Anyway GTX M series could not support GTX desktop software!
Please nVidia, stop rebranding old-technology (the great 8800) to new names, faking, and ending with GeForce GTX series (M) disabled to run software written for GeForce GTX series (desktop)!
