Custom Notebook Computers
Almost all laptops have some customizability. Most have swappable ram and storage, and some higher-end models also have swappable GPUs and CPUs.
Gaming laptops will feature discrete GPUs, which typical laptops never will, to save battery life; a more powerful CPU and memory are also typically present.
Gaming laptops can give you comparable performance on the go, and you don't have to give up desktop comforts like external mice, keyboards, and separate monitors when you're at home. Gaming laptops are also when you have gaming needs in several locations but want to stick with one easy-to-move computer.
An ultraportable laptop is a laptop that typically weighs less than 5 pounds and is thin and small in nature. Sometimes these laptops will feature 'on-the-go' centric features such as a touch screen with transformable ergonomics, like turning into a tablet form factor, for example.