In a way, it’s one less reason to have to use something like Adobe Bridge. While I get that Windows has had a similar feature for ages, for Mac users, I think this will be particularly useful. Those are the new gallery and EXIF information views in the finder. There was, however, a couple of features in the MacOS finder that could actually prove quite useful.
There wasn't much announced in yesterday’s WWDC keynote targeted at photographers, apart from some new search suggestions and ways to share in Photos.
