Call me a pessimist, but I just don't see any practical use in real life, nothing more than a gimmick, just like holograms when they showed them in Star Wars, 40 years later no practical use for everyday.
The difference is the holograms in Star Wars were Hollywood FX fantasy. They were also confined to static positions and have the functional use that a Flatscreen does. People just looked at the holograms.
Apple AR kit is blowing the minds of developers and anyone who lives at the crossroads of the Real and Digital because it is
interactive.
Very immediately this has practical applications in architecture and design. At a consumer grade level, this applies to home remolding and repair projects. Using the ARKit system to do room scans, and then populate/rearrange furniture or preview possible structural changes.
For home repair and maintenance, take all of those "How to fix X" YouTube videos and turn them into AR live guides. Everything from toilets to car engines. How about an AR Repair guide to your washing machine or dryer? Any object that already has a digital (CAD) blueprint of its production model could be turned into a live Virtual object, and aligned (as the example of the writing shows) to an identifiable real world object.
Actually, take any "How to..." physical activity video from YouTube and you can likely find a way to set it up as an AR guide.
While the early stage of the AR Kit may not be perfect tracking and object recognition, it's close enough to show the technology is heading very quickly in the right direction.
What currently gets in the way is having to devote one hand to holding the Phone, which is why people want Glasses to go with AR. Although currently wearing something like the Samsuns Gear VR (with an opening for outward facing camera) could be a temporary solution.
If you don't think any of this is "everyday user" level, then you need to take a spin through Do-It-Yourself project boards more often. Plenty of people undertake amateur home and appliance repair instead of hiring "professionals". It's why Do-It-Yourself repair videos even exist as a category on YouTube. You can search "How to Repair a TV" and you'll get thousands of hits just in videos. Many of those could become interactive AR guides from the manufacturers themselves. If sites like iFixIt don't jump on AR repair guides I'll be very surprised.