Most of the technological innovations in "The Veldt" sound great at first. But once you realize that they're replacing human relationships and actually reducing adults to the level of helpless children, then they don't seem like such a good idea all of a sudden. A kitchen table that actually cuts your bread for you sounds like the ultimate labor-saving device, the kind of thing you'd see on an infomercial. But the problem is that, if something goes wrong with the technology—and technology always breaks down at some point—then you're in big trouble. It's no exaggeration to say that if all the appliances in their super-deluxe kitchen that do everything for them end up on the fritz, then the Hadleys could practically starve to death.
In some ways, then, the children's nursery, with its ultra-realistic lions, is simply the ultimate example of the many dangers inherent in all the various technological devices arrayed around this bright, shiny Happylife Home. Even if the Hadleys had not ended up as breakfast for the ferocious beasts of the veldt, it's likely that, sooner or later, they would've met their unfortunate ends at the robotic hands of one of their labor-saving devices. If the bread-slicing table had gone haywire, for example, the consequences simply don't bear thinking about.