Such as? Because bluetooth and lightning headphones already work without having to remove the jack. It seems more like the loss of an option.
I've been mentioning that for a while. It seems to fall on deaf ears.
However that said one leak I saw from everythingapplepro had what looked to be a speaker there (stereo) and although I don't particularly like the idea of removing the headphone jack I can at least get behind the idea of something else being in its place.