Von der Asus ROG Seite:
Do note that it’s not a replacement for the current model and both PGs will exist side-by-side as top-tier gaming monitors, providing a choice to gamers looking at 27-inch displays; between the fast gaming 144Hz, WQHD/8-bit TN PG278Q and the higher 4K resolution, with in-plane switching (IPS spec) LCD in the PG28AQ .