Not every frame is rendered on the highest powered hardware with the highest settings. On mobile, battery life is important. On desktop, in gaming, many players

Not every frame is rendered on the highest powered hardware with the highest settings. On mobile, battery life is important. On desktop, in gaming, many players don’t have the highest-end graphics cards. And even for those who do, GPU resources are often committed to other tasks beyond rendering like simulation, NPC AI, etc. Super resolution allows for apparently higher pixel count with (in some cases) acceptable image quality while still using GPU for compute or not burning up the battery.