The wife and I both have Acer Iconia A500 tabs - expanded my 16GB internal storage with a 32GB microSD chip.
At first I didn't really see the need for getting a tablet - like you said my smartphone does everything a tablet does anyways.
But having the bigger screen is great - for viewing photography on-the-go...playing the occasional game...watchin' a movie. I also loaded it up with all my MP3s and wire it into my work vehicle sound system.
Good for showing potential clients photography samples, too.
