The difference is that an iPad docked to a keyboard isn't a fully functioning laptop. It seems like the author is looking for (for instance) a device that runs OS X, with all the power of a MBA when in laptop mode, but once you detach the screen runs iOS and has limited functionality. So maybe the author really just has a problem with the limited capabilities of iOS and the performance difference between an iPad and a MBP.
Sounds like the "keyboard" would then have to have special hardware (pricey/not efficient) or the pad would have to have multicore/scalable hardware that draws more power when connected to the "keyboard" and the keyboard could have extra hardware like more storage and IO ports and a PSU/high capacity battery. It would be cool to merge this concept with something like padphone - sort of a Russian doll concept :) And the ARM manufacturers seem to be going that route for performance anyway - adding cores/disabling them for power saving. I assume the same concept could be applied to memory and GPU.
Ok, that might be what the author wants and needs, but why does he claim to be able to tell everyone else what they want? That seems kinda self-important to me. Your own experience is not necessarily that of everyone else.
