As demand for notebooks continues to surge, Microsoft on Tuesday unveiled the next-generation model in its Surface Laptop series. The new clamshell, the Microsoft Surface Laptop 4, will again be offered in two sizes but will include one major update compared to the Surface Laptop 3—with the ability to choose between either AMD or Intel processors this time around. The Surface Laptop is targeted as Microsoft’s mainstream notebook series, offered alongside the company’s Surface Book detachable notebook and Surface Pro 2-in-1 tablet offerings that are more focused on professionals. What follows are five key things to know about Microsoft’s Surface Laptop 4.