The Inquierer link has more info.
Intel went to great lengths to highlight the new P-states and C-states in which it can completely shut down the clock of a core. The firm said the operating system needs to provide "hints" to the processor in order to make use of power states and it seems likely that such hints are presently not provided by the Linux kernel in order to properly make use of Clover Trail.
I don't buy tablets, so I don't really care, but usually Intel supports their hardware on Linux to a good extent, like the article mentions. It is unfortunate that they will not support it, but maybe they will change their mind as the kernel evolves or maybe this Clover Trail will just fail, like the article predicts.