How about social search? Sparks has a huge potential, doesn't it? Facebook's greatest strength is its huge social graph. However, they still didn't create a really valuable social search.
Facebook can easily mimic google circles. But, who will be better at combining search and social to add some new value to both?
And hangouts? It could be quite hard for someone to make a good implementation, and still have a huge user base as google.
Anyway, circles seems like the easiest feature to implement for the likes of facebook. Good social search, and group video chat, this might be more difficult (facebooks classic chat isn't even working most of the time).
Facebook can easily mimic google circles. But, who will be better at combining search and social to add some new value to both?
And hangouts? It could be quite hard for someone to make a good implementation, and still have a huge user base as google.
Anyway, circles seems like the easiest feature to implement for the likes of facebook. Good social search, and group video chat, this might be more difficult (facebooks classic chat isn't even working most of the time).