Rockchip may be the new "China Processor", that ARM Processor coming out of China that can be found in some of the cheap Android Tablets and Laptops. This could be a major part of China's attempt at providing every component of future low cost computing devices, even the processor. The new version of the Rockchip processor is said to be faster, RK2808 is 600mhz while RK2818 can go to 1ghz. But according to Toms Hardware, this new Rockchip RK2818 might still be ARM926EJ-S ARMv5 based.
In practice, RK2808 reached 1.1 DMIPS per MHz, while a core based on the Cortex A8 is 2 DMIPS per MHz and the recent Cortex A9 is 2.5 per DMIPS MHz. Even at 1 GHz, a Rockchip will be about two times slower than what the Cortex competition offers (at a higher price).
The question might be, how much cheaper are ARM9 based devices? Rockchip might still be only for low-end lower cost devices mostly made by Chinese manufacturers. The good news is this new Rockchip can support Android 2.1 and 2.2 (while RK2808 can only do Android 1.5). It's got to be thanks to its newer and better DSP graphics accelerator, with screen support at up to 1024x768 which could be great to power cheap ARM Powered laptops and low cost 10" Android Tablets. Availability may be after September for a bunch of new RK2818 based products or maybe also simply quick upgrades of RK2808 based designs. I wonder if the new 720p video playback on RK2818 may be improved, while RK2808 could only playback H264 MKV 720p at up to 2.5mbit/s.
Source: Toms Hardware France (in french)