For me it depends. Some movies benefit more from the big screen than others. For example I went to see both Avatar movies in the cinema since those specifically shine because of their effects. With many other movies I agree that a good home cinema leaves little to be desired.
The other reason why I sometimes like the cinema experience is because it forces me to pay more attention and not get distracted. That might be a self-discipline issue, but this way i don’t randomly pick up my phone or similar. itespecially helps me appreciate longer slow movies more. For example something like “drive my car” (almost 3h long) that I glad I caught in the cinema when it came out