That 64GB, $800 Microsoft Surface Pro you plan on buying next week? Maybe you should temper your storage expectations a bit, as the base model actually only allots 23GB of that space for use. The larger 128GB version offers a bit more space at 83GB, but is still losing a massive 45GB of space to the full Windows 8 operating system and various included applications.
128GB Surface Pro ships with 83GB free, 64GB has only 23GB
I think I mentioned earlier, why bother with such a small capacity SSD in the first place and why not allow the option of installing larger capacity hard drives? What's left after installing an Office suite and other programs, such as from Adobe? About 14GB.
Even the iPad is going to 128GB and it hardly needs it due to its OS and applications: Apple boosts fourth-generation iPad to 128GB for $799 (update: carrier support).