The desktop app works only as a screen saver and features native Mac integration. Once installed, ‘Google Featured’ will appear as an option in the Desktop & Screen Saver preferences window… The 7.8 MB app is free and works with macOS 10.9 Mavericks and above.
And on Android:
Featured Photos can be accessed through the Google Wallpapers app launched with the Pixel. Available for all devices, an update rolling out today will add Google+ as a new source to select for your home or lock screen image. The Wallpapers picker will include attributions to allow for easy following in Google+ and allows for auto updating once a day.

[Via]
We leave this running our TV via Chromcast. It’s great, the pictures are often fascinating.
Want: Make the captions more informative. Every once in a while, a photo of some amazing place turns up. But the only clue about where it is was “Photo by Grishny Drobinakov”