As a long-term Lightroom user (who's never used DaVinci Resolve before), to me this doesn't look like it's positioned to compete with LR as a primary photo library/editor tool.

If that is their goal, then I think it's a huge failure. What they've done is add photo support to Resolve, which is still primarily a video tool. All the video stuff is there — most parts of the UI is oriented around video clips and video editing. The photo editing is kind of buried in there.

Compared to Lightroom, this doesn't seem like it's designed to be a real library management tool, let alone a DAM. Lightroom has very good support for previews, decoupling the library metadata from the physical media, and so on.