Slate Magazine has the following story.

Most Sunday mornings at Buckhead Church in downtown Atlanta, one person is conspicuously absent: the senior pastor, Andy Stanley. A nationally known evangelist, Stanley is usually 20 minutes away at North Point Community Church, the suburban megachurch he has led for 13 years. To the 6,000 or so faithful at Buckhead, he appears only on video, his digital image projected in front of the congregation in life-sized 3-D. The preacher is a hologram.

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The Slate story estimates that an estimated 2,000 to 2,500 U.S. congregations now operate multiple campuses, and many of them, like Buckhead Church, are so-called video venues. The Leadership Network, a Christian nonprofit that follows these multisite churches, says there will be 30,000 of them within a few years.