An ultrawide 21:9 monitor or super ultrawide 32:9 monitor has a very large screen, so you need a lot of pixels to fill this screen. Make sure you choose an Ultrawide monitor with high resolution, otherwise the image will become blurry. From low to high, it's WQHD, 4K, and 5K. WQHD is enough for general use, but for gaming, photo editing, or graphic design, you may want 4K or even 5K.