If you book a "Polaris business class" ticket on United, it's still much more likely that you'll get the old seat than the new one. But you will get the new Polaris service and soft product such as the Bloody Mary bar and blankets/pillows from Saks Fifth Avenue.United says that the remainder of its long-haul fleet should be outfitted with the new seat by "early 2021" - three years from now.