BE AWARE: if you playing off a tablet in bright sunshine, it may heat up and shut down. Yes, it happened to me. I got a BLACK SCREEN OF DEATH on my iPad and a message along the lines of "Shutting down as the iPad is over heating", while sitting on my deck and checking out playing from an ipad. Is this a big problem? Well, playing outdoors, at Farmer's Markets, without a tent cover, maybe.
I am still on paper for one big reason - my music sheets are in Chordify format, inline chord notation, and I mark the sheet up heavily while learning a song to ensure I play and sing the song as intended by the songwriter. Eyesight is also not what it used to be so I can print in a larger than normal font / two pages if need be.
Not saying I'll never go to a tablet, great recommendations provided on this thread for if/when I do.