alt Hacker NewsThank you for bringing this up. All the marketing (and the "journalism" regurgitating it) are writing as though 'seaglider' is a word I ought to be familiar with, but have never encountered before. I had a lot of "these things seem a lot like an ekranoplane variant, but they're not calling them that" puzzlement.
I think the other commenter is correct, that it's one company (Regent) trying to make "Seaglider" a thing.
For obvious reasons - which word would you rather introduce to the public: "Ekranoplan", or "Seaglider".
If anyone else is working on modern Ekranoplans, I'd like to know. But AFAIK, it's just one company working on it, and promoting it.