And on a none portable computer you could probably do it even faster. Maybe you need a laptop but there are tons of peoples using laptops that doesn't needs to.
Not everybody needs a laptop, or a super powerful development machine. But if you want to process some stuff nice and quickly, while not being tied to any physical location, it's a totally reasonable solution.
The wonderful thing about a laptop is that if I want to go sit by a window for an hour while I'm working, I can just stand up and move. A desktop chains me to my desk, deep within the heart of a dimly lit cubicle farm.
Not everybody needs a laptop, or a super powerful development machine. But if you want to process some stuff nice and quickly, while not being tied to any physical location, it's a totally reasonable solution.