As 2015 draws to a close, you may be making resolutions to eat healthier, get to the gym and save more money. If saving money is on your list, you may be considering upgrading to new, energy-efficient home appliances. But these new gadgets often come with hefty price tags -- which raise the question of whether theyll save you enough money to be worthwhile. Today, we are looking at some of the "smart" appliance upgrades out there -- and whether you should consider the investment. Thermosta...