Sony is investigating the USB Type-C connector, has no intention to use it anytime soon
USB Type-C ports are definitely the way of the future, as the same port can now be used for multiple purposes, such data transfer, video output, and faster charging. At the moment, however, there are few other devices and accessories that use the new USB standard, and the advantages that USB Type-C brings are negated if everything around your new device still uses older USB formats.
The Sony executive also said that the company is actively investigating thinner and lighter designs, but that USB Type-C will play no part in that, at least for the moment. Instead, the company is focusing on reducing the thickness of both the display and the camera module. As a side note, one can wonder just how thin Sony plans to go with its upcoming smartphones. The Sony Xperia Z4/Z3+ is just 6.9mm thick, so perhaps other improvements should be given higher priority over making upcoming handsets even thinner.