Intel has produced a new technology - mature enough that we could see it in laptops soon - called Robson that dramatically speeds up boot times, application start-up times and helps save battery power in the process. In essence it is simply another form of cache, as explained in this Computerworld piece. The big difference seems to be the way it's used, the size (they can supply up to 4GB) and how it can be employed both by the system as a whole and by the OS to speed up general application access.