YMMV but my kids love their piles and piles of books even if they also want to be on their iPads pretty often. I give 'em a little time each day to watch a bit of TV, a little time on the tablet, as much time playing with friends and reading books as they want ... and they choose books a lot of the time.

I think if you just gave them the tablet and walked away, they might not look for anything else ... but that's true of any human of any age, it seems.