To quash any discussion about whether actual detail has been added by super resolution v3, here's a screenshot comparison that shows the super resolution v3 and the scaled difference between super resolution v3 and theAvisynth Spline64 Resize:

http://screenshotcomparison.com/comparison/121938

If the added detail was "micro contrast in the grain structure", the added detail should be random, since film grain is random. As we can see Obi-Wan and Luke's shape in the difference image, this is very clearly not the case.

Also, both Luke and the background are out of focus, as the camera is focused on Obi-Wan. As there are hardly any details in out of focus film, no details should be added in those areas, as is the case in this example.