You're basing your entire opinion on an assumption. Perhaps the people who purchase this product aren't only going on holiday for a few days. Perhaps, like my parents, they are travelling all around the country for six months. In which case relaxing with the TV on after having spent 10+ hours hiking miles around mountain area's and beaches isn't that bad of a thing.
Pretty sad if you can't live without TV for a few days while on a holiday. Suppose it might be useful if you are a contractor working away from home and staying in a caravan/camper van though.
Ok if you can get one, but these offers are always store specific.