Moving towards Christian convergence?

Are we moving toward a "united Christianity"? That's the assertion made by Adrian Pabst on the Guardian's  Comment is Free site. In the article, Pabst suggests that by opening a new chapter of theological engagement and concrete co-operation with Orthodoxy and Anglicanism, Pope Benedict XVI is changing the terms of debate about church reunification, leading to "the end of the Great Schism between east and west and a union of the main episcopally-based churches" - by which Pabst is referring to Orthodoxy, Roman Catholicism and Anglicanism. Leaving aside the miniscule size of Anglicanism compared to Orthodoxy and Roman Catholicism, this does not, of, course add up to a "united Christianity".