Let's see

- Privacy (sender and receiver)

- Speed (basically instant)

- Use it offline (in intranets)

- Bearer instrument (you can put the token inside things, think of an onion data package)

- Reliable (you can stream zero tokens of which none will fail)

- Programmable (you can have spending conditions, like with Bitcoin)

- Liabilities auditable (soonTM)

It's not a replacement for noncustodial Lightning at all. It's just a different way (better in almost every way) of using Bitcoin custodially.