That's part of what my job has turned out to be over the last few years. And, it is getting better.TV manufacturers have a lot to answer for with their MotionFlow shite, ambient backlight, and pisspoor factory settings all set to default right out of the box. It wouldn't be at all hard for them to have a "24fps 35mm Blu-ray" setting which automatically turns all that shite off and effectively calibrates your display for optimal Blu-ray viewing.
Panasonic have "True Cinema" on the mid-range models and THX/ISF modes on the higher-end ones. Samsung's "Movie" mode is usually also quite good. The trouble is, the viewer actually has to select that mode, and many don't change the default settings at all.
The fact that there are different names for what the accurate mode is, and sometimes more adjustments to be done afterwards, shows that we're not there yet. There's a lot of consumer education to do (the fact that a TV picture can be right or wrong is news to a lot of people, including those who should ideally know better, who are used to playing with the controls daily "to suit their preferences" as instructed by the manufacturer). But the situation is much better than it used to be: at least you CAN now get undistorted video out of most displays, even if you need to be a technician to do it!
The fact that you can't define a pixel to be a certain colour and brightness and get it out the other end undistorted (well, within reasonable manufacturing tolerances) is silly.