There has been a debate about whether HP has or has not developed a memristor. It being something fairly different from existing technologies, and similar in many ways to a memristor, I think they felt comfortable using the term. However, there are those not happy about HP using that labeling. On the other hand, had HP created a new unique label, they would have probably gotten flack for pretending it's something new when it's not. What positive will come from the debate? Martin Reynolds sums it up nicely:
“Is Stan Williams being sloppy by calling it a ‘memristor’? Yeah, he is,” Martin Reynolds tells Wired. “Is Blaise Moutett being pedantic in saying it is not a ‘memristor’? Yeah, he is. [...] At the end of day, it doesn’t matter how it works as long as it gives us the ability to build devices with really high density storage.”"
Link to Original Source