Guys, you are forgetting one thing
The USBC is devised to carry a larger wattage of power than is the USBA or USBB cables. This is why all the rapid charging alternatives use USBC and PD uses USBC. Thunderbolt is an extension of USBC with greater speed and more, but as I see it the implementation of what the standards call for is highly subjective at this point.
Maybe there will be some clarity at some point, but some devices implement USBC and thunderbolt over one channel, meaning that the speed of the Thunderbolt /USBC port is limited to 5 MB per second, while others use multiple channels and go up to 20 MB per second. That of course with a cable designed to handle that speed (most USBC cables are rated to handle 5 MB per second, the same theoretical limit of USBB).
What I have found with PCs that have both ports, the USBC port is generally 3 - 5x faster than the USBA or USBB port. There is no scientific basis behind that conclusion however.
Whether you believe that USBC is the future or whether it will be some sort of wireless connectivity over some variant of wireless networking or bluetooth is an open discussion that has merit but will also have a flurry of conversations that will think this statement is more heresy than anything else.