The next time someone asks if you have a hybrid, consider your answer carefully. He may not be asking about your wheels, but instead about something else that spins—your data storage. Coming soon to the storage stage is a technology called a "hybrid drive," which melds a traditional hard drive with a massive flash-based buffer.
Now, rather than relying on a traditional hard drive that works through the use of nothing but moving parts, your system could make use of a similar device that can last longer, generate less heat, and use less power due to its ability to shut down moving parts, even when in use.
Check out their article for some more info about the benefits of these new HDDs.