27-inch 4K OLED 240Hz monitors seem to be like buses: you wait ages for one and then three turn up at once. Asus, Samsung, and MSI are all announcing the industry’s next-generation QD-OLED gaming monitors that offer the benefits of 4K OLED 240Hz panels at the smaller 27-inch size instead of 32 inches.All three appear to be using the same fourth generation QD-OLED panel from Samsung Display, which Asus says offers “a longer lifespan over previous-gen OLEDs.” Both the Asus ROG Swift OLED PG27UCDM ...