Background information and context for stuff.
Highlight the best and worst items when you're shopping based on your health, budget, ingredients and reviews.
Highlight stuff you need to buy, no shopping list required because inventory can be taken automatically. This could include suggesting recipes you already have most of the ingredients for.
Social reminders - you met this person at X, discussed y, etc.
Social cues like topics to discuss for awkward people and body language analysis.
Guide you to the nearest bathroom, or your friend, or anywhere else.
Automatically correct for vision impairments. And magnify or zoom out on something.
Allow you to discretely look at anything while talking to someone - read a book, facebook/background checks, boobs, whatever.
OCR'ing physical stuff on demand so you can adjust the font, size, color etc to read more clearly, include annotations, translations, word lookups, etc.
And the first billion dollar apps .....
- put [fake] words into cats' mouths
- detect the % chance the person you're talking to will sleep with you
- a social network of people who spontaneously, anonymously fuck and identifies other members around you