1800p/120fps? I've honestly never seen that resolution attempted. But as I keep saying, native res is somewhat arbitrary above 1440p, and more like a stat. Especially at a higher framerate.1800p is an interesting compromise, and the temporal resolution increase of doubling a 60Hz image should actually make it look more detailed than 4K/60, since 1440p/120fps would have been 1:1 pixels.
I am looking forward to hearing from you guys about these 120Hz setups, and how much you feel it improves immersion. I have seen 120fps games on PC way back, but it's harder to imaging in a livingroom setting, somehow.