If they stick with the current system, next will be USB4.1 Gen 2, while USB4 gets retroactively renamed to USB4.1 Gen 1. But that's assuming they don't find a

If they stick with the current system, next will be USB4.1 Gen 2, while USB4 gets retroactively renamed to USB4.1 Gen 1. But that's assuming they don't find a creative new way to name USB4 versions poorly.