There's probably a surplus of RAM available right now, due to slowing PC sales, and a tightness of flash supply due to surging cell phone, tablet and SSD sales.
Unless several more new flash fabs come online to bring supply levels above demand we probably won't see a particulary rapid cost reduction there. Even shrinking from 0.3x to 0.2x micron manufacturing nodes didn't have a very large impact on price despite it essentially doubles the potential number of chips (and thus storage capacity) per silicon wafer.