China-based chip manufacturer Allwinner recently launched a quad-core processor targeted at phablets, or 5-7 inch tablets with cellular connectivity options.
Chinese processor manufacturer Rockchip remains on track to launch its RK3188 quad-core SoC in February. The chip - manufactured using 28nm HKMG process technology - is built around an ARM Cortex-A9 design clocked at 1.8-2.0 GHz.
A prominent industry analyst reports that Apple is working with Taiwanese chip manufacturer TSMC to design 20nm quad-core chips for use in future iOS devices.
The talented devs over at XDA have managed to overclock a quad-core Google Nexus 7 tablet to a screaming 2.0 GHz using a specially coded "Elite Kernel."
Intel's 22nm "Valley View" Atom processor is reportedly a quad-core SoC loaded with Ivy Bridge graphics. The next-gen chip - which could arrive by 2013 - may also offer a 4x performance boost.
Apple has embedded support for quad-core ARM CPUs in its Xcode developer tool. Such processors could one day power next-gen iPhones, iPads and even future MacBook Airs.
Apple has refreshed its iMac lineup with Intel quad-core (i5/i7) processors, advanced AMD graphics, high-speed Thunderbolt I/O technology and a new FaceTime HD camera.