I'm really surprised to see that only the photos and some small other parts of my work with Photo get synchronized through iCloud Fotostream to my different Apple devices. No Book, np Slideshow, not even Face tiles get synchronized.
This is very disappointing.
As I am traveling a lot with train I really like to do parts of my work on journey with my MacBook Air. Then back at home I would like to continue with my iMac. Isn't this exactly what Apple already offered for emails and other programs with Hands Off technology?
And now they unveil a brand new application without this helpful feature. I really hope that this will be added in a future release.
MacBook Air, OS X Yosemite (10.10.3), iCoud Fotostream