Apple and Google show off rival augmented-reality tech

The Walking Dead: Our World - a zombie-themed video game in which players battle with the undead in real-world locations Ikea Place - an app that allows the furniture store's products to be seen over views of rooms in the owner's home Giphy World Babysitter - software that superimposes a thumbs-up or "not OK" sign over food it is shown in order to let carers know if it is suitable for infants The Very Hungry Caterpillar in AR - a mixed-reality version of the children's tale that allows youngsters to see the herbivore walk around their surroundings before transforming into a butterfly and taking to the sky