Promising material could lead to faster, cheaper computer memory. Currently, information on a computer is encoded by magnetic fields, a process that requires substantial energy and generates waste heat. Researchers have confirmed that bismuth ferrite could store information cheaply and with less wasted energy. Source 7b.
I'm sure it'd help out energy-wise but cost wise? I doubt certain companies would waste a good opportunity for them to get higher profit and not reduce the prices for the ram!