GNOME Photos is designed to fullfill your needs to:

- View local and online/cloud collections
- View photos on attached devices
- View photos on DLNA media servers
- See new photos shared by friends
- View full screen slideshows
- Share photos (email, IM, ?)
- Upload photos
- Set as background
- Select favorites
- Very basic manipulation: Rotate, Crop, Enhance, Remove/Delete, Combine into an Album
- Allow opening full featured editor for more advanced changes