You may not find a use for it, and neither do I in my workflow. But think about accessibility - it might enable some users to perform tasks the find physically difficult using just their voice.
Or, you can go get a beer or a [slice of] pizza, and call out to vscode from across the room to build your app or start a server or something.
Indeed - users that need accessable features should not rely on each piece of software they use to supply them. But even as a one-off feature, it is a good thing to have IMO, as it will certainly expose APIs and hooks in vscode for other accessibility software to utilize.