What is “9070-series” supposed to be? “9070” isn’t a series but a specific graphics card! If you want to reference the whole series, then say “9000-series”!
It doesn’t say this in the article, but they mention it in the DF video: they couldn’t tell which card it was on exactly, it was a 9070 or 9070 XT engineering sample.
Technically they just announced the 9070 and the 9070 XT, so there are two different designs that could be considered part of the “9070-series”. They could also be saying “series” because most of the 9070s on the market will be AIB boards with slightly different feature sets.
I think there’s a marketing slide from AMD saying they’re renaming their GPUs to better match competition. So 9070 series cards are supposed to match 5070 series cards, that’ll be 5070, 5070 Ti as of now and super later on.