A few thoughts:
I was struck by the use of a gaiwan by Jet Li in the movie "Fearless" (he quaffs some tea directly from it in between bouts in the village square) set in the mid-to-late 19th century. A good number of scenes in that film take place in incredible multi-storied tea houses that I would love to build a replica of in the US.
If you want to see interesting anachronisms in tea equipment/ methodology try last year's Hong Kong release "Tea Fight", a martial- arts tea-brewing film if you can imagine such a thing. It features tea brewing competitions between competing clans in both the Song dynasty and modern day, but the contestants use Tang dynasty-style trough-and-disc tea grinders as well as Song and Ming equipage. Very odd.
Regarding the comment about Yixing pots not being around in the Tang dynasty, that's true to some degree. Per the book "Yixing Pottery: The World of Chinese Tea Culture" (a nice guide to Yixing history and traditional pot styles), Yixing was producing Celadon and clay pottery in quantity as early as the 11th century BC. They show archeological examples of true zisha Yixing tea pots that date to the Northern Song Dynasty, just after the fall of the Tang.
An interesting discussion! Charles