To the extent it’s measurable, LLMs are becoming more creative as the models improve. I think it’s a bold statement to say they’ll NEVER be creative. Once again, we’ll have to see. Creativity very well could be emergent from training on large datasets. But also it might not be. I recommend not speaking in such absolutes about a technology that is improving every day.
Difficult to measure, but trivial to define.
Creativity means play, as in not following rules, adding something of yourself.
Something a computer just can't do.
"To the extent it's measurable" is very load-bearing in the semantics here. A lot of "creativity" is very hard to measure.