The Nexus 5 has CDMA. What does it mean?

Google last released CDMA nexus on Verizon and Sprint with the Galaxy Nexus and paid the price with slow updates. The Nexus 4 showed Google had learned its lesson. But now the FCC documents show the N5 has CDMA, potentially compatible with Verizon too.

What does it mean?

My theory is that Google has finally figured out how to solve Nexus fragmentation by "breaking" Android into pieces like a Kit Kat. The launcher, camera, email, gallery, phone, contacts, and SMS could all be Play Store updated. And OEMs might follow suit to roll out updates faster.

What's your theory?