You've seen what it looks like to control The Sims, but have you ever wondered what it would be like to be a Sim? This graduate thesis project looks pretty close to us.
The work of student Julia Yu Tsao, this is called "Curious Displays", a network of "½ inch display blocks" that, if ever produced, would crawl around your house and, when you needed to be notified of something, form displays. Go here, pick this up, clean this, drink this, etc etc.
So, yeah, just like being a Sim. Just note, if you see one saying "Climb in here while I brick this up and starve you to death", best ignore it.