nVidia doesn't need that to support Optimus on Linux. With Catalyst MUX-less Intal HD + Radeon HD works fine for one year, so it may works in Optimus case too, but nVidia doesn't care about laptop users, so they not implement this.
Read nVidia engineer carefully - do you even notice, Robert Morell doesn't talk about Optimus (Intel HD + GeForce) and support of existing users? He talk only about Tegra + GeForce. Good luck to you in waiting for official Optimus support by nVidia. Sure, you probably get it someday, but don't wait it soon.