These tanks look lower tech than 1.0 NPCs and fit the Fatui's established design aesthetic perfectly:
>big clunky exaggerated features
>beakish mask-like "face"
>recessed glowing inset details
>visible bolts/rivets with logical placements
We've already seen autonomous wheeled mining equipment in Fontaine and the hangar they're in is just a blue version of Meropide. Absolutely nothing what was shown conflicts with what we've had in the game for years. The whole version is looking like a logical progression from Fontaine, only making Natlan stand out as more of a nonsensical theme park tacked on to the game than a natural extension of Teyvat.