This is used on the deck specifically for framegen. Native frame gen options in games add a lot of latency at 30 or less fps, which usually makes them unplayable. Lossless scaling 's framegen option is less accurate in creating the in-between frames, but has far less input latency, making it a viable option.

It doesn’t work for all games, some games will still feel really bad with it enabled. But there are a lot of games where you can use it to run a 30fps game at 60fps, with only slightly more input lag than using a Bluetooth controller.