all of what you said really exists today and is in use (just not as widely as perhaps it should be) i.e. those brackets exist and are available on many airline

all of what you said really exists today and is in use (just not as widely as perhaps it should be) i.e. those brackets exist and are available on many airlines today. Sometimes they provide wifi with the ability to connect to the provided entertainment system (so one doesn't have to bring one's own content, just the display device).