Air travel is not likely to take off till early next year. Even when it does, it will likely reach pre-Covid levels only in 2024. Just think about the impact on the world economies. It’s not just the airlines who will suffer; their supporting and related industries will likewise suffer.
Meanwhile, countries are preparing themselves to support limited and essential travel. For example, in Singapore visitors entering Singapore are required to wear a device to monitor their whereabouts as they have to observe mandatory stand home notice for 14 days.
Similar quarantine devices are used elsewhere – Hong Kong, Korea, Jordan and even Kuwait. It doesn’t intrude on privacy. It is a necessary measure to curb the spread of Covid-19.