Books have been around forever and will probably still be around in the future.
Books may be around but more as a few high dollar premium items than as “by the bushel”. Anything read once and done with will be rental model. Only real keepers will be purchased, at costs reflecting collectability over simple content delivery.
I have 26 bookcases. Any books I get now over electronic versions are either because they’re dirt cheap or special. Mundane reading, well, this iPad has several hundred books taking up no space and little total cost.