I keep an eye on solutions like this with a hope that it can provide

• solid private transactions by default (that are better than lightning)
• be easily self custodial by default (better than lightning)
• fees and price comparable to lightning
• speed comparable to lightning
• cheap conflict resolution (better than lightning)
• non interactive sending/static addresses (better than default lightning)
• ux of "get app and receive immediately"
• can onboard self custodially a billion people
• no need to be online for a long time
• easy recovery in another wallet/app