Yes, you can play World of Warcraft: Wrath of the Lich King on two screens. You can either use two monitors, or if you have a TV, you can connect your computer to it and play on the bigger screen. Having two screens can give you a better field of view and can help you spot enemies and objectives easier. It also helps to have a dedicated UI screen, where you can keep track of your character's stats, inventory, and quest objectives. Having two screens can make playing World of Warcraft a more immersive and enjoyable experience.