Since Dante is already the dominant IP audio networking technology, why is AES67 needed?

Dante is a complete media networking solution designed for high quality AV streaming. The A/V industry has embraced Dante because it is easy to set up, delivers a rich and robust feature set and is the most interoperable networking solution available. From the beginning, Audinate has incorporated standards to create the Dante product suite, and AES67 provides another standards-based transport choice within Dante for Layer-3 / IP-based audio networks.