Thanks for the informative reply.
In the near term, one of the problems with Ultrabooks and Tablet/laptop hybrids is their relatively high price.
I see the mix shifting downwards towards i3 processors and can become more constructive on the stock if I'm wrong and they can hold pricing.
In the long term, the structural issues are more problematic for Intel. The non-Intel software ecosystems including iOS, WinRT and Android will grow just by the massive volumes of units that will ship. It is not unreasonable to expect that the ARM device manufacturers (AAPL, Samsung) will develop good-enough silicon for these ecosystems that will support most Win-tel use-cases. I see the tipping point happening when they can deliver Merom-levels of performance - perhaps on the 20nm node and certainly in the node afterwards.