So far all of their moves in regards to USB 3+ and type-c seem to have been to cater to various consumer companies.
If we put it in that context, then this new re-branding has to be done for the same reason - so that the same companies can claim to support a "newer" USB standard (and thus a reason for you to upgrade to the new devices), even though nothing has changed.
If we put it in that context, then this new re-branding has to be done for the same reason - so that the same companies can claim to support a "newer" USB standard (and thus a reason for you to upgrade to the new devices), even though nothing has changed.