Apple sales support is unable to answer if an AC power cord is included with the Apple Studio Display. Since I ordered one this morning I was curious.
Apple www site says Thunderbolt cable is in the box, no mention of AC power cord.
Sales insist that the display is powered by the Thunderbolt cable 
Seems unlikely
The picture under “In the Box” shows a power cord connected to the Studio Display.
This actually brings up an interesting question: the circular power cord connection in the picture looks similar to the one in the 24" iMac. Similar to the iMac, this looks like may be too thin for a conventional plug. I wonder if we’ll get another magnetic power cable?
There’s also pics of it without the cord, so I doubt it’s permanently attached.
That’s pretty much what the power connector on the 24" iMac looks like.
The Pro Display XDR is quite a bit thicker, so it makes sense that it can accommodate a conventional power cable.
The tech specs say that it has 96W upstream charging, so it’s not Thunderbolt powered.
The specs also say 100-240V AC.
I think they just didn’t mention the power cord.
(sorry, should have replied to the thread)
Right. It outputs as much power as the most powerful charger Apple sells. It was specifically mentioned somewhere that you can use it to charge your laptop in the same Thunderbolt cable used to transfer video. Therefore, the display cannot be powered by the computer. The power goes the other way. So it absolutely needs to be plugged in to the wall (mains power), which would be the 100-240V AC spec. Of course, that doesn’t tell us if a power cord is in the box, only that one is required to provide power to it.
There’s lots of evidence that one would.
Maybe those Apple Sales support folks will watch the Youtube videos.
They were pleasant folks doing their best but at least 3 of them tried to convince me that the Studio Display was powered by the Thunderbolt cable that’s listed under “What’s In The Box”. 
It turns out that the power cable is permanently attached to the display (see Ars Technica’s review; scroll down to “The Bad” at the bottom). Presumably the list of contents would only list individual separate components. As the power cable is not a separate component, it’s not listed.
Does anyone know how long the Studio Display’s power cable is? A quick DuckDuckGo search did not return an answer.
