Alright, let's just forget for a moment all the tinfoil hat theories about how google execs are going to break into your house and drink your milk or create humanoid robots that govern your state into the ground. Reality is that this would be a criminal's best friend. What are you going to automate with Android, your security system, your lights, your locks? I can't even trust most apps with my contact info, I certainly don't want them controlling my home.
Use it if you want, but don't complain when you come home to an emptied house because you're too lazy to get off the couch and turn the thermostat down yourself.