Feels strange to admit this, but I think I agree with gartner (again, this is pretty rare for me anyway). At the end of the day, container or VM it really doesn't matter, it is a minor technical difference (speaking to the "business" level people gartner talks to).
Techie folks like us care more about the details but from a higher level perspective the concept is very similar of having multiple "instances", on shared hardware. Even if containers aren't as isolated as VMs, the end result is pretty similar.
At the end I think that's all that really matters.