Translation
Translation: "Our manufacturing process is crap, and following high failure rates a number of OEMs have asked us to prevent OC-ing because the warranty claims are killing us."
Frankly, I'm amazed it took this long. On my last laptop I went through 3 GPUs (GeForce GTX260M, followed by two underclocked (yes, I modified the BIOS to underclock and undervolt to keep temperatures reasonably sane) Quadro FX3700Ms).
The simple fact is that Nvidia don't actually make laptop GPUs - they rebadge desktop ones and ship them with a different power profile (lower clock speeds and voltages) programmed into the BIOS.
Either way, this will only be an issue for people who feel the need to be on the drivers' bleeding edge for some reason. The previous version of the driver already supports all the GPUs available today, so this will only really become an even remotely serious issue when the next generation of GPUs comes out (which isn't expected to happen any time soon).