Clearly you haven't used the tech you're criticizing. Hint -- connected lighting doesn't replace using the switch to flick on or off. You can still use the switch (duh), but now you can set programs for the room, multiple rooms, and schedules. This is way more useful than walking around the house and turning things on or off. And the color values are impossible in traditional bulbs anyhow.
As for the therm -- if you aren't using a program (manually set or learned) then you're burning money needlessly. It's that simple.
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I do agree that over time a smart thermostat will save you some money. Or even a basic programmable one. What I'm not quite sold on is the light switch stuff. I just bought a couple WeMo switches and really liked them at first. I bought them as a means of having my outside lights on a timer. I ended up removing them because they interfered with my garage door openers to the point they didn't work from more than five feet away. But anyway, I replaced them with a Honeywell timer switch that offers the same timing capabilities, was cheaper, no signal interference, and won't stop working if my wifi signal drops.
I think the home automation stuff is cool, but right now it's just too expensive to be anything more than a cool, non-necessary thing for people to buy.