Just because both parents are home, that doesn't necessarily mean the kid will learn what he needs to learn.
Some people pay more attention to their kids than other people do. And if she's always talking about getting these gadgets, maybe she's the type who supervises her kids in the sense of keeping them safe but not in the sense of interacting with them-maybe she's playing with the gadgets.
If the right kind of TV sh9w is on, the kid might pick some up from there, but we don't know what shows she has on the TV.
So, I wouldn't discourage her from the Head Start thing. If you have to talk with her, maybe this is even a good topic to get you away from the gadget talk.