Google map indicating which street to take directly (like an arrow on the road), showing relevant infos on items you're looking at in a shop (price, calories, halal/kosher/vegan...), showing the name and notes about people you're talking to, helpful infos on construction sites...

That's just a few examples, we'll get much more use cases when it begins to be used, but there is definitely a lot of potential.

Playing Minecraft (and regular gaming in general) is not a good use case, I'll give you that.