In an ideal world, computers would only have one type of data storage, but thanks to the laws of physics and businesses, we have two main types three if you count CPU L caches .
Previous PCM implementations only used 1 bit per cell, basically equivalent to storing either 0 or 1 2 values .
"Someday" being the operative word here.
As no actual commercially available implementation has been launched yet, we can't really speculate on how viable PCM will be as a replacement for both DRAM and flash.
As mentioned, it is a topic of interest in the wider computing industry, including other companies.
Suffice it to say, whoever is able to come out with a wallet-friendly and reliable solution first could very well end up in the annals of computing history as the pioneers of the new age of computer memory.