Microsoft's 64GB Surface Pro will only have 23GB usable storage
Found on The Verge on Wednesday, 30 January 2013
A company spokesperson has confirmed to The Verge that the 64GB edition of Surface Pro will have 23GB of free storage out of the box. The 128GB model will have 83GB of free storage. It appears that the Windows 8 install, built-in apps, and a recovery partition will make up the 41GB total on the base Surface Pro model.
The Windows RT operating system, that powers Surface RT, accounts for half of the 32GB disk space on the entry model.
Maybe storage is getting too cheap. Developers these days don't seem to care about it anymore and waste it for no reasons. I'm just guessing here, but I think that Windows on those tablets has e.g. support for all sorts of hardware which however cannot be added to the tablet. MS is trying a "one size fits all" approach which is rather stupid.