Good group, my main concern in that list is Pure. As far as I am aware, you must own their hardware to use their software. NTNX saw this as a limiting factor for themselves and got rid of the hardware requirement, which opened up a lot of doors.
I would offer Zscaler as well. While my research is not complete and therefore my conviction not solid, I do believe companies will opt for software-defined-networking and firewall-As-a-service vs spending capital on traditional networking.