Some day: we join Him. We reside with Him. We abide with Him. We are in His presence. There is no longer a distinction between places where God is and isn't. It seems that we may no longer need churches, even, because the House of God will be all in all. Eternal life is worship. Eternal life is eternal presence.
And yet, today, we embrace the omni-presence, but we wrestle with it, don't we? We "come into God's presence" in worship. Weren't we already there? Isn't He always here? Yes. And yet, we're not sure, it seems. So, we need places. We need buildings. We need to gather with God's people.