You see headlines like this every couple years. The first ship to do this did it in 1906 https://en.wikipedia.org/wiki/Gj%C3%B8a, and it was done again in in 1942 https://en.wikipedia.org/wiki/St._Roch_(ship)
Agree that navigation of the northern passage of itself is not new, but the anticipated year round transit without icebreaker is.
i.e. these were major expeditions of the "visit the South Pole" sort, not commercial ventures that took a couple weeks.
When a non-specialised ship goes through without an ice breaker will be another first.