Gigantic passenger planes currently being developed will have enough space to hold shops and lounges in addition to passenger seating  However, the additional space will more likely be used for more passenger seating
The number of passengers flying the air-traffic system is expected to triple within 20 years, and it will be impossible for airports to accommodate enough normal-sized jet planes to carry that many passengers
The number of passengers flying the air-traffic system is expected to triple within 20 years.