Intel is too late, and won't be able to compete in the price.
The next hot chip for tablets and mobile devices will be QCOM S4, which has
integrated LTE and fast enough CPU/GPU. Intel ATOM doesn't have LTE
integration which is not good enough. Those devices only having WIFI will go with Tegra3 because it's much cheaper. Nvidia has to price to $20 or less in order to get market share from QCOM or TI or Samsung or even Huawei.
Can Intel sell ATOM at $20 each ? I serious doubt. Intel could use the fab
to make other chip, such as network and even flash for the SSD. The margin
on those products much higher than $20 ATOM.