Hardware unboxed compares DLSS 2 to DLSS 3 in the video below. For the most part, DLSS 3 seems like a downgrade with visual artifacts and increased latency. The slower the frame rate the more noticeable the artifacts. DLSS 3 might make the game look smoother, but it will feel more sluggish, so it's not good for competitive gaming. Best use case is a single player games running at over 120fps on a 240Hz monitor. People who buy 240Hz monitors probably do so for competitive gaming, so I'm not sure who would use DLSS 3.