> 2. 'docker update' command, although I would have preferred 'docker limit'. Ability to change container limits at runtime: - CPUQuota - CpusetCpus - CpusetMems - Memory - MemorySwap - MemoryReservation - KernelMemory

This is not correct. You cannot change kernel memory limits on Linux after processes have been started (disclaimer: I've done a bunch of work with the runC code that deals with this in order to add support for the pids cgroup). You can update everything else though.