The official governance page shows that the Cosmos community has voted to approve the "Gaia v16 upgrade" proposal, and the Cosmos Hub will perform the v16 upgrade at block height 20440500 (May 15).
According to reports, the Gaia v16 upgrade will include 4 major new features: ICA controller submodule, IBC rate limit module (with the initial rate limit outlined in Proposal 890), IBC fee module, ICS epochs (part of ICS v4.1.0). At the same time, after the governance vote is approved, the relevant binary files of Gaia v16.0.0 need to be updated and submitted to the Cosmos Hub. The update process takes about two weeks.