United introduced Polaris on December 1, 2016, which is the name for their new first & business class experience. This includes new airline lounges, improved food & beverages, better bedding, and also new seats.
The catch is that United’s new business class seat is so far only available on 777-300ER aircraft, and as of now United has just one of those. So while you can experience the new soft product, it’ll be a few years before most passengers in Polaris find themselves in the new seat.
At the moment United is operating 6x weekly flights between Newark and San Francisco on the 777-300R. Meanwhile the 777-300ER will make its international debut as of March 25, 2017, when United starts flying the plane between San Francisco and Hong Kong.