There are many other uses for large amounts of RAM in a laptop (8GB of which, is not large by the way). For example, My gaming laptop has 32GB of ram installed. I allocate a portion of that as a RAM drive to load certain games out of which I have found really benefit from the incredibly fast I/O rates, and very low access times (as opposed to a standard magnetic media hard drive). This isn't limited to just games either. I imagine lots of other applications would benefit from this kind of setup as well.
There's also the bragging factor, but the novelty wore off pretty quick.