Which ship are you looking at cruising on? Some have more dining options than others. They all have a buffet restaurant and main dining rooms, but Norwegian is the industry leader on extra-fee dining venues so their ships also have several places where you pay to eat - not that you have to do so but they are quite popular.
I had a 26" flat screen TV in my studio cabin on Norwegian Getaway last month. I believe that is the size they use in most regular cabins, with larger screens in suites.