Better late than never!
Not that it will entice me to buy Optimus technology, mind you. But at least once it works the poor souls who do own such a system will have something better than that Bumblebee monstrosity.
Nvidia's Optimus GPU switching technology may be coming to Linux. Nvidia coder Aaron Plattner and a team of software developers has conjured up a working "proof of concept" that ties Nvidia's technology into the X Window RandR extension, allowing the display image to be selectively rendered on a laptop's Nvidia GPU and on a …
Bumblebee is a mere workaround which doesn't use the Optimus technology itself, but a dual X11 setup with one server tied to each card. Remember: even if Bumblebee (kinda) works for the end-user it doesn't mean it actually exploits the hardware as it should (in the same vein, software floating-point calculations are not a FPU, and a software 3D rasterizer is not a GPU).
As such, this NVidia project which integrates directly with XRanR at the driver level is the first actual proof of concept of Optimus technology on Linux.