"Internet" isn't for a computer, it's for access to magickal bits & bytes that machines can feed off of, like a fountain that dispenses water. Comcast provides the water.
I have 5 computers in my bedroom. I don't pay 5X worth of internet to get them hooked up. I pay once, and multiple devices are allowed to hookup a faucet, pump, nipple, etc., -- including a gaming console.