Google Photos search function leverages some automatic categorization, it's pretty good. I wish I had some way to run something at that level over my Lightroom 5 catalog.

Does your smartphone not already do that for you? iPhone does, I think Android does and I think iPhoto on macOS does as well. It wouldn’t surprise me if Google online photos or Facebook do also.

(That is, let you search using words for things in the photo or themes like “winter”).