Thunderbolt and USB standards can be very confusing. OWC has prepared this helpful infographic explaining the differences.
You can pre-order the OWC Thunderbolt 3 Dock with 13 ports of connectivity as well as USB-C cables and adapters.
Thunderbolt 3 cables (which subsume USB-C) are a better choice (handling both Thunderbolt 3 and USB-C), but will be more expensive and are not yet available.
Missing/not noted in graphic: Thunderbolt 3 can drive one 5K display which supports Thunderbolt 3, or two 4K displays via Mini DisplayPort.