I read that people to strive to find competent babysitters. I think technology could improve the efficacy of babysitting.
To keep babysitters from just parking the child in front of a TV or media console the smart home sensors and software could detect this then log it, or, if extreme, text the parents.
This might be a new smart house application that actually does something beneficial.
Also, automated telephone calls could telephone the babysitter every 1/2 hour or hour to suggest an activity, then if the babysitter does that activity the smart home sensors log it.
This would make it so a well meaning yet somewhat lazy babysitter would be able to read to the kids, do a science museum science kit, and thus avoid 4 hours of TV.