Vocaloid jargon sorry, the specific clothes sets are often called "Module"
That specific appearance is Miku Symphony 5th from the concert event with the same name.
It is an orchestra concert, so no hologram live appearance in this case, but the design still has reference material.
These are official concept art
notice the Crypton Future Media mark.
This was turned into a nendroid.
then GoodSmile made this one.
I do firmly believe that this is done on purpose there, since GoodSmile is quite known for fanservice oriented figures.