Recently, unless they changed something in the last week DLSS 2 is IMO not worth it to play in 4k vs 1440.
DLSS 3 still only looks fine on cherry picked screens: “It looks like DLSS 3's weakness lies in hidden geometry, where information is missing between two frames due to geometry overlapping another set of geometry while in motion. This can cause DLSS 3 to "shutter" and output ugly artifacts as it tries to fill in the void of missing detail.” https://www.tomshardware.com/news/dlss-3-early-review-rtx-40...
DLSS 3 still only looks fine on cherry picked screens: “It looks like DLSS 3's weakness lies in hidden geometry, where information is missing between two frames due to geometry overlapping another set of geometry while in motion. This can cause DLSS 3 to "shutter" and output ugly artifacts as it tries to fill in the void of missing detail.” https://www.tomshardware.com/news/dlss-3-early-review-rtx-40...