I hope I am wrong but I see the next generation as completely discless specially if this current generation discless versions sold good enough. The only exception could be Nintendo.
Of course they might require some deals with stores or just sell themselves the consoles online.... Because the stores want to sell games, they might still sell peripherals and redeemable cards for money or maybe CD keys... No idea tough, but if the benefits fall they might say "Nah I am not selling your console if games aren't sold here".