Interesting to see that the 4k looks so much better than 1080p at high zoom level.

Blackout said:
I know my blu-ray player is able to enhance the picture quality of DVDs it plays, and it doesn’t take a second longer for the player to make that conversion. Is that or a similar feature to SuperResolution or Detail-Preserving Upscale, and if so, why is the BD player able to perform it so quickly, and if not, why not use the same optimization software/technology(or w/e it is) for every movie?

I would guess it’s more something like detail-preserving upscale, but not as good and complex, therefore less intensive to compute. There might be a dedicated chip for upscaling in the player which has hardware features that improve the speed of such calculations. Or it is the software that is tailored very well for the chip.
If someone could grab the output signal of their upscaled image from the player and compare it with the results from this thread, that would be cool.