if facebook starts video calling for the masses then it is very good. but remember that fb voice calling is horrible. i do not know how it gonna be video calling. zukerberg should now think to change the name of facebook too. ;P
Most of us here are used to logging into facebook whether we like it or not, the same way we do with google for search... more of a habit... and remember its difficult to change habit within a day, even if you have something good as an alternative