I've tested the new RSR with a few games, it works great with some, however, there's a catch. I tried the old 2d Pharaoh game with RSR enabled and it does work. But the image is flickering between 4:3 and 16:9 spect ratios at first, and then stops at stable 16:9. The upscale from 768p to 1440p looks great on that particular game, but the aspect ratio is off. So I tried to play with GPU scaling settings, making it center the scaled image instead of stretching it full-screen. That seemed to turn the RSR off and revert to simple scaling.
So, the feature is great and I think it's only logical to fuse it with the GPU screen scaling, so it would work more seamlessly and support even the oldest games.
