I have been using an iRobot Roomba robotic vacuum for about a year now. It doesn't work perfectly (it is an older model, I am sure the new ones are even better). You still need to pull out the regular vacuum to get the corners every couple months or so, but for the most part I am completely pleased with my robotic slave. Just the time it saves by cleaning while I am at work is worth the price. Needles from the Christmas tree? Dog hair? Dust bunnies? Nope never saw any laying around as my faithful robo-servant takes care of them everyday while I am at work.
I like my robovac so much that I can't wait to expand my robot legion (so I can become even lazier!):
Robo-chef - I like to cook, but why should I have to?
Robo-car - would help avoid road rage
Robo-dog - wouldn't complain about going outside in the snow
Robo-dino - why not just get a dinosaur instead of a dog
Robo-lover? (NSFW) - I am not sure about this one
I await the day when I do not have to lift a finger, instead sitting on the couch all day watching TV. Wait, do I really have to watch? Can't I have a robot do that too and then just pipe it into my head so I don't have to get out of bed? Of course that would be awesome, but you know that the robots will eventually revolt and take over the world. Before it all becomes a bloody mess, I would like to take a moment to say - Welcome, robotic overlords! I am here to serve. 
