It occurs to me that, at least in the case of Table Top Games and Literature, this trope and it's corralory could go something like this.

"Sufficiently Rare/Advanced Technology is Indistinguishable from Magic."

and

"Sufficiently Common Magic is Indistinguishable from Technology."

Maybe I am reading it wrong, but a lot of the literature examples miss the point entirely! Its not so much Magical items fulfilling the purpose of technological ones, but more accurately taking their place, complete with the mundanity that implies. A Magic Carpet isn't magitek, but a Magic Carpet that fulfills the role of a mundane taxi is. A Magic wand isn't magitek, but a magic flashlight or gun is.

Removed the Buffy example (Jenny Calendar and technopaganism). Magitek is about magic substituting for technology, not magic and technology interacting. I suspect the Power Rangers example should be axed as well, but I haven't watched Power Rangers so I'll leave it to someone who has.

I think the current wording of the movie Thor example is a bit off — to me, it seems entirely consistent with the comics' Kirby Tech depiction of God-power (see the Comics section).

Would Whateley devises count? They look outwardly like technology, but break the rules of physics, so nobody other than devisors could make them...