When reviewing metadata, I'd like to be able to skip untagged photos and go to my next tagged photo (or green photo, 5-star photo, or some other criteria).
This would be helpful for me when I have tagged a keeper but don't have the information in that frame to make my caption (covered jersey numbers, in my case). Once I'm at my tagged photo, I could then go back and forth around neighboring images to find my metadata and update my caption. Once I've made my update, then I could jump to my next tagged photo and repeat the process.
(Of course, this might be possible some other way, so let me know if I'm missing it!)