These have been around for a while, and every time I see one I thank the innovator who came up with it. Some people want to dip their fries. Others want to squeeze the ketchup (or catsup, as some still spell it) directly onto their food (or even apply it individually onto each piece). This is the best of both worlds.
It goes to show that not all technology is a matter of wires, bytes, and binary code. Sometimes, the best technology involves taking an old concept and making it better.