We released our research results earlier this week. A new super light client protocol, decentralized and eclipse resistant. Needing just 20kb to sync to Ethereum.
Here is the paper: Cryptology ePrint Archive: Report 2019/579 - BlockQuick: Super-Light Client Protocol for Blockchain Validation on Constrained Devices
and the announcement: Blockquick Super Light Blockchain Client For Trustless Time
The first use case we’re addressing is to use decentralized PKI (DPKI) from those small IoT devices.