Ideally, as easy to interface with as possible for non-tech literate users. My mother-in-law once told my wife "I don't know why you would ever want to strengthen your mind." in response to confronting my wife on why she was reading a book outside as a child instead of playing physically. This is a mantra she has continued well into her 50's and is still going "strong". I need something she can access and download pictures from to print off and hang on her wall like she does from FB now. This is essentially the low bar. Everyone else should be more competent than that.