The advantages of memristor technology are many. In ordinary conventional non-volatile storage it offers densities higher than flash and speeds approaching SDRAM. I'll let you work out the implications of that on your own.
If those are reasy HP and partners can sell them at a premium.
For example, pricing memristor based drives exceedingly high will still likely put them well within the price range of ultra high-end flash based enterprise level drives (such as card based multi-terabyte SLC based drives), and so will still result in a canibalization of flash sales.