What is NVIDIAs DLSS 5 and why is it so controversial?

If you've spent any time on gaming social media this week, you'll see a lot of comparison screenshots of video games. The most common ones you'll see are split-screen comparisons between an OG shot of the game and one that's slightly more detailed, with a promise that this will be the "future" of gaming.This Tweet is currently unavailable. It might be loading or has been removed.
That's DLSS 5, NVIDIA's latest and most ambitious version of its AI upscaling technology, officially launching Sept.