You are missing the point, they are static because they are made out of high quality resin, not plastic or PVC which is the material aimed at kids.
...you don't believe that those things are made with natural resin.. do you?
It's just another form of plastic.
But anyway, "the material aimed at kids" does this:
& I've never seen this on a resin, except possibly (..but not really) on promotional pictures, nothing mass-produced.
I don't know where the realism comes from, the details of the sculpt, the paints used, the talent.. but it's all there.
Regardless, hot toys look like plastic toys and do not impress me at all. They do not like the realistic prototype images.
oh they totally do! That's why I buy Hot Toys/EB dolls & not resins. You drool watching proto pictures of a SS resin, then you get it, and you get the usual crossed eyes & bleeding paint job, and in the best case, something that looks painted, like what your grandmother had on her chimney.
With HT/EB, you do get what you see, most of the time. Sure, it looks a bit different in-hand because they're not crazy, they will do pro pictures with perfect lighting, but you can do the same pics with the production batch, if you know how.
To do the same as on the promo pics, with SS, you'll have to get a pro painter redo it.
& I think there's still room for improvement, I'm still waiting for realistic hair, not lumps of plastic. I'm sure everyone looks down at rooted hair because people think it can only look like a Barbie. But one day a company will come up with mass-produced, yet realistic, pro-quality rooted hair, and all others will have to follow.