Voice input for dictation support has been added. The feature works by holding a node up to your mouth and speaking into the tag above the node.
The new text will replace existing text. While holding the tag close you can say "clear" to erase the text and start again.
Currently using the Windows speech services which relies on Microsoft cloud and must be enabled from the Windows Settings menu.
Hopefully this is a helpful alternative to VR typing or importing text from outside VR.