This is difficult to answer. Memristor-like devices (RRAM and similar) are still in an embrional phase. A lot of research is going on to assess the very nature of the physical mechanisms governing their behavior and to solve issues which are currently preventing their full industrial exploitation. Among varieties of memristor-like devices, metal-oxide-based RRAMs are the most encouraging alternative since their compatibility with existing CMOS process and the possibility to integrate them in the BEOL. Recently, SanDisk and Toshiba unveiled a fully-working 32-Gbit RRAM module at ISSCC 2013, developed with a 24nm process (they are crossbar devices with diode selectors). Still, it will take time to commercialize these devices since variability is currently a major threat to reliability and yield. In my opinion, we won't see a pc equipped with memristor-based memory before, at least, 3-4 years (but that can easily be an overly optimistic estimate).
Many thanks Francesco for this very interesting analysis of the situation.
BW, e Saluti
René
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