Late last year, Yorba, the company behind Geary and Shotwell, closed its doors. You can read their announcement here.
As Yorba is no longer active, their projects have been inactive for close to a year now. Geary has been taken up by the elementary OS team directly as Pantheon Mail, which has replaced Geary in Newt OS in order to reflect this transition.
However, Shotwell has not been directly adopted by any project. It is officially a Gnome project, but there has been no development on their part. While it is still a wonderful program, it will show its age as time goes on. This has lead me to look for an alternative to replace Shotwell in the future. Luckily, the elementary OS team maintains a fork of Shotwell as Pantheon Photos. Photos will replace Shotwell in the next major release of Newt OS, and has replaced Shotwell in the latest release of Newt OS Studio Loki.
Below you can find a screenshot of the new Photos app.
sudo zypper install pantheon-photos eog eog-plugins
Let me know what you think about this latest change. I think it is for the better.