Can rails4 live streaming feature, be compare with node.js

i m having project in mind, which i want to be real time web app, i m
looking at Meteor and Derby.js but they are too young. but recetly i
came
through to blog =>


and video => http://www.youtube.com/watch?v=g3O1PgvUzpo

so its a good idea to use Node.js for real time or i should wait for
rails4.

Thank you.

please reply

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