Are smart phones of use to authors?

Some readers of this blog might say, “What a stupid question? Of course, smart phones are useful.” And they might wonder if I need to be in a mental institution? But I’m talking about authors’ marketing of their books!

Here’s what motivates the question: I hate smart phones because they’re such a poor excuse for a laptop! (The recent foldout models basically admit that.) Those tiny phones in your pocket don’t have standard keyboards per se is one clear negative: I’m a touch-typist with big hands...