Just a little bit of piling on, but Microsoft posted a disk space FAQ regarding the amount of space actually available on their new surface tablet. Basically a 32G Surface has 16G free (after OS, recovery tools, Office and other built in apps), and the 64G Surface has 46G free.
Via 9to5 Mac where the story obviously has a pro-Apple bias, and one should note that if you were to include the Apple office software you get:
So you’d have to add an additional 800mb (approximately) to the size of the 1G iOS install size to be a more fair comparision. Of course, even 2G is a far cry from 16G used by the Windows RT install. Something to consider when doing an apples to apples comparison of various different tablets.