A lot like today. Half-in, half-out at most. Applications are the key driver. I could see this if IOT really takes off - autoconfiguration and unique address

A lot like today. Half-in, half-out at most. Applications are the key driver. I could see this if IOT really takes off - autoconfiguration and unique addressing are the attributes that would make IPv6 the only compelling choice. That said, IOT still has a ton of challenges.