I restored my Time Machine backup (including Photos) to a new MacBook Pro with a slightly older version of Yosemite installed, i.e. with iPhoto. When I updated Yosemite, Photos was installed in the process, and my iPhoto library was migrated to Photos, but iCloud Photo Sharing is not working on this new MacBook (it was on my old one). I do not see any of my shared photo streams on my MacBook (but I still do on my iPhone). I verified I have enabled iCloud Photo Sharing in System Preferences, iCloud, Photos. I have also enabled it in Photos.
Running Yosemite 10.10.3 and Photos 1.0.
MacBook Pro with Retina display, OS X Yosemite (10.10.3), 15-inch
