people can do all of those things with groups
People take conference calls with other people all the time. So much so entire companies have been built around the idea. Sitting in front of a computer to video chat with other people is hardly isolating. Plus computers can be used while others are present.
Movies are watched with other people present very often.
Again, VR is the only thing here that isolates you and literally blocks you from your surroundings, nor can anyone else see what you're doing.