This happens all the time. Given enough qualifiers, any movie is the "first" of its kind.

"This is the first computer animated movie"
"This is the first computer animated movie with photoreal humans"
"This is the first computer animated movie rendered with global illumination"
"This is the first computer animated movie rendered with global illumination, on a render farm of Linux servers"
"This is the first computer animated movie where the main character is green"
"This is the first computer animated movie where the main character is green and one of the characters is a cat"

It gets silly after a while. At some point you have to ask "is the movie any good?"

j