This looks very limited in sensitivity, but as a controller is the kind of thing that has been available from ICubeX for some time – the ICubeX one has touch sensors in the fingers and bend sensors on each finger. The challenge of course is getting it to be robust, self-contained and at a price point for mass use.
the TEControl USB MIDI Breath Controller, which has the same function as a combination of the BC3A and the “MIDI Solutions” converter box but with a USB-MIDI class compliant interface instead of the older standard DIN connector (although following popular demand we now also offer a model with standard DIN connector).
Source: USB MIDI Breath Controller
This is interesting – a high quality lab mic for iPhone with watch remote Sennheiser Clip-Mic Digital Iphone Lavalier Microphone – TAI Audio
Here is an excellent tute on getting the Rift working in Unity