This thing essentially looks like a standard headphone plug but with a bit shaved of making it D-shaped. I really hope this is just another one of those silly things created, patented and then never used.
First, we don't need a proprietary headphone connector.
Second, proprietary or not a headphone connector that only goes in one way is incredibly stupid. If we really need to move away from standard headphone adapters then use a lightning or USB-C port at least.
Third, if you can't fit a standard 3,5mm connector in the phone, guess what, you're making it too thin!