Re: I'd consider Surface more of a super ultrabook than a tablet
The tablet form is much more suited to content consumption rather than content production. If you are a serious producer, still desktop is best, and laptops have the advantage.
Apple tailored the OS to the tablet form and it will be more efficient in terms of using limited resources such as memory, processing power, and battery life.
They have tailored their content producing iWork package for the tablet and this is useful, but you don't want to use it for really serious, every day work. Any tablet will have exactly the same limitations, whether you attempt to run heavyweight software on it or not.
Of course, the form factors may merge down the track, but for now a rethink of the software as Apple has done is a breath of fresh air. The others have followed, except for Microsoft, which have rushed to play catchup.