It depends on the task and the UI. In some tools like CAD I need to switch tools a lot: add an element to sketch, constrain it, repeat. Switch back imto 3D, pic

It depends on the task and the UI. In some tools like CAD I need to switch tools a lot: add an element to sketch, constrain it, repeat. Switch back imto 3D, pick new construction plane, etc... most tools have pretty distinct names and could be called out faster than doing the mouse acrobatics. We aren't used to talking to things instead of humans. But I think that voice input would be the next logical step beyond the search bars for progran features that have been showing up in the last few years. These search bars are halfway to freeform textual commands. Entering such commands by voice is then mostly bashing together existing technology to make something new.