It seems that Samsung Korea’s website has recently uploaded a support page for a phone called the Galaxy X. While the page doesn’t tell us anything about the phone, it does confirm that a phone called the Galaxy X exists. It is possible that the Galaxy X could be the name for just about any phone, but previous reports have indicated that Samsung’s foldable phone could be called the Galaxy X.
That being said, the Galaxy X is rumored to be launched in 2018. The release has been pushed back several times, at least according to the rumors, but this support page does seem to hint that we could be getting close. However we should note that some are saying that the Galaxy X could be a limited-run device and that Samsung does not plan to produce many units, and that its availability could be exclusive to South Korea.
Presumably if things go well and the market reacts favorably, we’ll see Samsung start to churn out more of them in the future.