If companies are working on 3D, then they're not working on contrast, motion, color etc. (at least how they see it)
I don't mind it. I never use 3D on my set, but when I upgrade to 4K, I want passive 3D and will definitely make use of it there - but only for games.
Active 3D required manufacturers to finally make real improvements to motion handling on their sets - development on that front had been stagnating for a while until 3D came along, and then you got things like Panasonic using new phosphors and panel driving methods, and LCD manufacturers realizing they had to significantly improve motion - to the point where it is now better than plasma.