Remember the most recent Macbook refresh, the one which included a discrete GPU by Nvidia along with a higher end Nvidia 9Series graphic card?? One of the main user gripes with this awesome solution that boasted the best of both worlds between Nvidia’s two implementation(one for higher graphic requirements and one for usual no graphic stuff) was that to change between the two, one had to log off and then relogin. Usually to change between the 2 included a 5-10 second delay.
This is being resolved by Nvidia’s latest Optimus Technology that implements superfast switching between Intel’s graphic processor and the Graphic card, such that you cannot notice the switch.

Optimus is a new technology that allows Intel’s integrated GPU to coexist with a discrete Nvidia GPU in a new way, seamlessly alternating between the two depending on the task at hand. It works with GeForce 200M series, GeForce 300M series, next-gen GeForce M, and next-gen Ion GPUs, as well as Intel’s Core 2 Duo, Core i3/i5/i7, and Atom N450 processors.

Optimus still includes a manual option, but otherwise automatically decides what can run on integrated graphics (regular web browsing) and what needs an extra boost (games, Flash video, etc), making the switch for you behind the scenes. It makes the change so quickly by letting the Nvidia GPU handle the processing duties while still employing Intel’s IGP as a display controller, as in the diagram above.

Nvidia claims a 8x improvement in performance. Nvidia says there will be more than 50 notebooks packing Optimus by this summer, although today it’s launching only on a few Asus notebooks like the UL50Vf, an ultraportable which houses both a Core2Duo SU7300 and a GeForce G210M.