It is always clear if there is a baby on your plane. They tend to make themselves known at regular intervals in the flight, normally around takeoff and landing.
Until now you wouldn't know if you had been seated right next to one until boarding and you see an apologetic parent or two arrive.
This use of technology might help everyone have a more peaceful flight.
Passengers who loathe sitting next to babies on long flights can now rejoice, as some airlines have started to show families travelling with young children on seat allocation maps.
Parents of young children may also be delighted as child-unfriendly fellow passengers can elect to move few rows back.