Does anyone have a good explanation for what Docker+WASM actually is? This announcement explains what WASM is and what Docker is, but I already knew both of those and am still confused about what Docker+WASM is. Is it just wrapping a WASM binary in a Docker container?

The missing piece. WASM, specificially WASM run time environments, have the potential to replace containers in the future. If you can target WASM with Go, Rust, Python, C, C++ ... then you don't need containers at all.

BTW, the two WASM runtimes jockeying for position are wasmtime and wasmer. It looks like Docker is getting behind wasmtime.

The article states that they're using the wasmedge[0] runtime actually.

[0]: https://github.com/WasmEdge/WasmEdge/