The whole point to Intel’s new mSATA standard is to allow Ultrabooks the ability to provide more space to consumers.
The specification is called Next Generation Form Factor (NGFF) and should resolve problems with the current mobile mSATA specification. This specification causes future problems for Ultrabook manufacturers as it has limitations in the number of NAND flash chips that can be used. If manufacturers would like to increase the SSD capacity in their Ultrabooks the NGFF specification should enable them to use more chips, thus increasing capacity.
Another source states that the maximum size of drive supported may be as little as 512GB. But for the standard user, this might be OK. Not all vendors may be completely onboard with the new standard for fear of wasted previous generation of SSD Components.