Support is coming with the 560 series (I’m currently on 550 with Ubuntu), but only for newer cards. My 1060, based on the Pascal architecture, won’t get open-source drivers.
For newer GPUs from the Turing, Ampere, Ada Lovelace, or Hopper architectures, NVIDIA recommends switching to the open-source GPU kernel modules.
For older GPUs from the Maxwell, Pascal, or Volta architectures, the open-source GPU kernel modules are not compatible with your platform. Continue to use the NVIDIA proprietary driver.