Me either! Since these earlier sets are not exactly doing HDR and WCG properly, and there is no real standard yet, I will probably get the 3D version if I have an option. I watched all of The Martian 3D, and part of it in UHD, and I liked the 3D version best. Might not be the best example, but I am like you, I am not paying twice...
Ill prob go UHD on Batman v Superman because the 3D version is not the extended cut. I did not see it at the theater so the extended cut is all I want to see.