The "A-Drive" will be a cheaper alternative to the SSDs currently used in ultrabooks, offering the same instant-on capability but with larger storage capacity.
WD's innovative hybrid technology pairs MLC NAND flash storage for fast SSD-like data throughput and instant-on responsiveness with magnetic disks for efficient, high-capacity storage.
Increased data capacity, after all, makes it easier to use alternatives such as instant messaging and Skype, which could become as pervasive on smart-phones as they are on personal computers.