The only reason to watch on the big screen nowadays is to watch together with other people. Then a bigger screen gives more people the 'sweet spot' to enjoy the movie in. (I doubt anyone enjoys sitting in a corner in the cinema. To get a good view you need to come early and endure all the commercials)
If you're watching by yourself (or with spouse) then you can simply sit closer for the same effect while sitting in the perfect spot.
Anyway home theaters don't help with color grading on the disc, but at least at home you can calibrate it yourself. From switching between different presets based on the content to fine tuning everything.