The Inq wrote an analysis about Microsoft's and Intel's plans to introduce flash-based cashing technology:
Microsoft's 'ReadyBoost' allows the system to be aided by the addition of a USB flash-based memory device, allowing it to act as a system memory cache. Microsoft assures us that the accidental removal of an externally-fitted USB device shouldn't interfere with system stability, but this hardly seems the most ideal way of retro-fitting a PC with more system memory, which is how it is touted by the Vole.
This comes coupled with 'ReadyDrive', which supports the new hybrid hard-drives coming from the likes of Samsung and Seagate, where a large amount (128mb to 256mb) of Non-Volatile NAND-based flash memory is combined with the traditional magnetic platter. Similar benefits involving system performance and extended battery-life are touted for this hard-drive embedded method of caching..