According to ETH Daily, Celestia is developing its roadmap to scale up to 1GB blocks, with the aim of significantly increasing data throughput and reducing transaction fees for rollup. As a modular data availability blockchain, Celestia allows rollup to use any virtual machine as its execution layer. Celestia's first upgrade, called Lemongrass, is currently in development. The roadmap to 1GB blocks will involve multiple technology upgrades, including content-addressed memory pools, node sharding, and an enhanced availability sampling protocol. In addition to the expansion, Celestia aims to ensure that its block space can be validated by anyone on any device, by light nodes that can run in a web browser.