The hope is that in the future most devices will support USB Type C. Everything from phone, to your monitor, to your mouse can all use the same port to charge, transfer files and output video/audio.
While "multiport dongles" are just a temporary solution until the implementation of the "one port" solution, multiport dongles are useful devices to have at hand because multiport dongles let you upgrade the functionality of your workstation by expanding the number of ports of your desktop PC or laptop from a single a USB port without having to upgrade the hardware.
There are different types of multiport dongles but USB Type C multiport dongles are definitely the best investment because the USB Type C connection will become the future standard for all devices to do everything from the same USB-C port; hence it is a good idea to buy USB C enabled hardware.
With a multiport dongle such as the StarTech USB-C multiport adapter, you can power devices and charge devices via 100W Power Delivery. You can even connect this multiport adapter to a Thunderbolt 3 port as it is compatible.
The StarTech USB-C multiport adapter also lets you output 4K Ultra HD via HDMI, access data from memory cards via a high-speed SD 4.0 card reader, connect your laptop on a network over a Gigabit Ethernet wired connection and transfer digital data over USB 3.0 connection, all from a single, compact device.