Back in the day, people kept an "eye" on their sleeping babies by using their ears: Silence was a good thing. No crying or screaming equals a soundly sleeping child, right? Then audio baby monitors hit the market, and parents could be aware of every whimper from anywhere in the house. But silence was still a good thing. Then came video monitors, and parents could be aware of their child's every movement from anywhere in the house -- because what if silence isn't a good thing? Now we have monitors with wireless, multi-angle, night vision cameras and handheld LCD screens. Is this a good thing? We say anything that gives parents a little peace of mind in the middle of the night can't be entirely bad.