Bingowings said:

Dan you must be easy to startle :-D

LOL!---I guess so!

Having said that I have run Taxi Driver(which was sampled from a 4k master) and Close Encounters of the third Kind Blu ray discs through the internal sony 4k upscale algorithm(called reality creation) and the grain density in both these 2 films is very heavy to the point of distraction(it is definitely not digital noise------you can see the grain increase on any shot with optical effects---wipes/dissolves ect)

Film does have it's limitations.

On the other hand---Avatar and ROTS(and the other prequels) look amazing-----the images are as clean as a whistle.

I always considered myself a film/analogue man-----but maybe I am coming round to Lucas's(and Cameron's) "digital is best" way of thinking.