Samsung is making it simpler to shop for apps, in-app purchases, books and movies, among other things, on its smart TVs. Months after launching its mobile payment system, the Korean company's now introducing a new service aptly called "Samsung Pay on TV." You can either set it up with a credit/debit card or with a PayPal account -- once that's done, the TV will only ask you for a four-digit PIN number every time you make a purchase. If your CC numbers or PayPal email and password are already associated with a pre-existing Samsung account, they'll automatically be used with the service when you sign in. But in case you do have to type those in, the TV will make you use Samsung's new and secure virtual keyboard.