How would you go about re-creating "DLSS 5" running in real-time on local hardware?

I don't think anybody besides Nvidia engineers actually fully understand what's powering DLSS 5 yet, but most of the internet seems to believe it's a real-time image2image model. Is that technically possible now? If you were to use your hardware to re-create this effect, what currently available models would you use? Some threads from this subreddit that potentially may be relevant: October 23, 2023: We are now at 10 frames a second 512x512 with usable quality.