Uncharted 4's multiplayer will run at 60fps, with the resolution taking a slight hit to 900p - which contrasts with the single-player, which is hitting 1080p resolution and will be 30fps.
During a presentation following Sony's Paris Games Week show, Naughty Dog confirmed that multiplayer would be 60fps as it went into details on the mode, which introduces new magical elements and a more complex, varied brand of competitive play. We'll have more on Sony's slate in the not too distant future.
http://www.eurogamer.net/articles/2015-10-27-uncharted-4-multiplayer-will-be-60-frames-per-second
