Check out an enlarged comparison here.
Grass is an effective example for demonstrating sample points, but don't be fooled into thinking grass is the only beneficiary of DSR's capabilities. In almost every game DSR will increase the quality of textures, shadows, effects, anti-aliasing, ambient occlusion shading, geometric detail, and model detail to some degree.
Enabling DSR couldn't be easier: simply click 'Optimize' in GeForce Experience 2.1.2 when GeForce Driver 344.11 WHQL or newer is installed. Only games that lack UI scaling and/or support for resolutions over 1920x1080 are excluded from this feature. If you still wish to enable DSR in these games, perhaps for screenshot purposes, and in other games not supported by GeForce Experience, enter the NVIDIA Control Panel, select the DSR scaling factors you want to use, and select the corresponding DSR resolution in-game.