I'd say it depends on how you bring your kids up that allows them to realise that reading is a good thing, not the medium they use to access the written word.
So I can only relate my personal experience here and it only extends as far as kids who are two and a half years old[*], but I notice that children learn (not exclusively, but often) by example/imitation, and the example of reading a physical book - taking it off the shelf, turning the pages, etc - is way more powerful than the example of holding a rectangluar glass-and-plastic object and poking ones finger at it - which could be reading, could be flappy birds, could be online gambling
I'm sure that'll change when he gets older and more capable of abstract thought but for the time being I think he's much happier reading a board book version of The Very Hungry Caterpillar with the holes in the pages than I would be if he decides to put a hole in my android tablet. But even then, I think that having books lining the living room walls is going to make them far more accessible than having to ask to borrow Daddy's Amazon account
[*] not even that, actually.
one particular child who is two and a half years old.