WebCodecsA low-level codec API will better support emerging applications, such as latency-sensitive game streaming, client-side effects or transcoding, and polyfillable media container support, without the increased network and CPU cost of JavaScript or WebAssembly codec implementations
navigator.scheduling.isFramePendingProvides developers with better information for making decisions in code about when to defer work and yield back to the browser's event loop
WebTransportWebTransport provides a client-server API that supports bidirectional transfer of both unreliable and reliable data, using UDP-like datagrams and cancellable streams
Found here: https://chromestatus.com/features
Interesting:
Less of a priority: