When it comes to this week's holiday shopping plans, we seem to be looking at another year of the tablet. But that isn't the only shopping trend this year centered around gadgets. I'm talking smart devices. Whether it's the Wi-Fi capable smoke detector or a home-locking system that talks to your smart phone, there are an increasing number of products for sale. Not all of the stocking stuffers are totally essential, but they do give us a sense of our connected future.