Ordinary people will confuse it between the iDevice standard though. Remember that ordinary consumers are quite often lazy and don't expect to have to think about how to use stuff.
True. And that is probably enough reason to not implement TRRS from a commercial point of view.
However, speaking of plugs, I just found this. Sony seem to have another idea for a new standard: http://www.innerfidelity.com/content/canjam-rmaf-2014-showstopper-sonys-proposed-new-industry-standard-headphone-plugs
5 poles obviously give a lot of options.
Just an hour or so ago Nao Tsunoda of Sony showed these to me.
We had a chat about the Z7 tuning too and tried the Z5 IEMs, which were nice (and tuned more towards what I like, though still with significant bass). Back soon with more about all of that.