They already did! samsung is announcing 2 G9 models in CES this year, this one that is VA LCD with 4K resolution, and an OLED version, that will have 1440p resolution. Probably just a wider cut of the screen they use for the 34" variant. Additionally the OLED will have 240hz refresh rate and will apparently also be a smart monitor with Samsung's smart OS on it, altough they wasn't bvery clear on that, maybe it will just get a cut-down version of it with a few pre-selected apps.
For now, I'm just wondering how high prices will go.