My favorite gadgets of the last 2 years:
Nest - http://www.nest.com/
Nest is to thermostats what the IPhone was to the phone. Easy to set up, beautiful user interface, connects to the Internet and let's you remotely control it with your iPhone or Android phone. It tries to learn your temperature preferences, and can save you money by automatically detecting when you're not at home.
Gaggia Unica Automatic Espresso Machine - http://www.wholelattelove.com/Gaggia/ga_unica.cfm
Coffee snobs may not approve of an automatic espresso machine, but being able to push a button and 30 seconds later you've got an espresso is pretty darn cool, and as far as I can tell, it's as good as any other espresso I've had. Normally these automatic machines cost upwards of $2,000, but the Gaggia Unica is way cheaper, and seems to work just as well.
Roku - http://www.roku.com/
Plugs into your TV, gives you a bunch of both on-demand and streaming channels. If you're a Netflix subscriber you can watch Netflix movies and TV shows. Similarly for Amazon and other online services.
I'm probably forgetting a few other gadgets, I'll add them here if I remember.