QUOTE(chokia @ Nov 9 2013, 06:36 AM)
XBMC can play 4K file too but do you think that the output really 4K on your 1080p TV?
XBMC cant play 4k file on ATV2.
XBMC for ATV2 can playback most videos saved as high as 1080p.
But you are right Sir, although XBMC can play the 1080 file, it will scale it down to 720 for output it.
However the quality of scale down 1080 to 720 output is still better than 720.
You can try by playing a movie of 720 and 1080, and see the output different on screen.
YIFY usually provide 720 and 1080 movie file.
This is why I stop storing 720 movie and start having 1080 movie.
I have 2TB NAS, so from 680MB file to 1.2GB is still bearable to gain such quality.
Again, 1080 in non-DVD format (avi, mp4, mkv file) is compressed movie file and different from 1080p DVD format file in term of quality.