1. The use of AR on movie posters is a good way to promote or advertise a movie because people can access different things like the trailer and link to movie on one poster.
2. Other instances you can use AR in today's world is for example, you can create one where someone can see the interior of a car that they would like to buy instead of going to stores to see it. You can use it in many different ways.
3. Blippar is very easy to use and has many widgets that you can choose from to add to a picture or poster.