First off Linux is just the Kernel, the kernel team does not design operating systems, let alone computers. I am sure that some manufacturers are now considering building aiPad like devices that run Linux based distros like Android, however because of the popularity/consumer monopolies of win** and apple it would not be a good marketing decision for them to announce that they are using Linux aka something different. I can pretty much guarantee that computer manufacturers will be pushing them in no time at all, but you won't hear the word linux from their announcments, so they will be reasonable quiet launches.
Personally I use Linux all of the time, but even if Linux is announced to be on a mobile device I won't purchase the toys like cellphones, book readers, tablets, etc... because I find no use for them in my life. I prefer to be the developer/maintainer rather than a blind consumer. that runs to get hte latest and greatest.