Apparently a gimmick is what people say it is... It doesn't matter if it's innovation or something old but improved. In the end it's always a gimmick... or so it seems if the people saying it is a gimmick were correct that is. I think people tend to say it's a gimmick just because they want to have reasons not to get the specific product/brand while "protecting" their own product/brand
That's my take of it.. in short