I think it would be useful and convenient to be able to control the Sena with voice commands. For example:

I would say "play/pause/rewind/forward" to control media
I would say "one/two/three" to connect intercoms paired on one/two/three
I would say "sidetone" to toggle sidetone on/off
etc

The main benefit of this is to get quick access to common features without having to take my hand off the handlebars and fiddle with the Sena.