If you just google it, you can find information on them. They are called solid-state hard drives. Ive read that a few notebook companies want to start offering them (In small storage sizes) in their notebooks by next year or the year after. You can already buy like 10gb models that are bootable online right now for your desktop and laptop, but its pricy.
Solid State Hard Drives
-Limited storoage space
CompTIA A+, CompTIA Network+, Cisco CCENT, Cisco CCNA Routing & Switching