The new DisplayPort 2.1 standard is not only backwards compatible with 2.0 devices, but will also supersede it. All DP 2.0 products will be certified to use the stricter DP 2.1 spec as well.
Displayport 2.0 RSS
Over three years after the last major update, the DisplayPort standard has reached version 2.0, and it comes with some big improvements. You'll be able to use up to two 8K displays at once.