I shoot sport and 'lock' files in camera to mark those I think will make it for press use. The XQD cards are so quick at downloading that it would be useful to ingest all and then select just those I locked in camera. Sometimes a locked one is not quite right and the one before or after is the better/sharper shot that, in the speed of the touchline, I didnt lock in camera but being able to see it either side of a locked file would be helpful.
By being able to select 'locked' would highlight the chosen ones amongst the whole download.