I think it will be very important how they deal with the Flickr UI. Whether they will

- change Flickr to look more like SmugMug (if at all the platforms are not merged),

- or leave it as it is today (the slow, heavy, and glossy Flickr),

- or try to bring back something close to the blazing fast Flickr days when it looked so clean and minimal and was not at all glossy.

Many of us are pining for the latter.