Late to this thread, but I can't resist chiming in... My answer to what wear in an "emergency house exit in the middle of the night" - normal clothes!

I have two pairs of pants in very light weight synthetic fabric which are very comfortable in bed. Each has normal pockets and cargo pockets. I usually sleep with my key ring in the right pocket (I am a left side sleeper). If I must get up and get out, I already have on my person a small multitool (PS4), a flashlight, car and house keys and a couple of other items. In colder weather, I also like to wear a fleece jacket to bed. Mine have zip pockets and can hold the key ring, etc. I keep a pair of Crocs at my bedside to slip into when I get out of the sack.

If I must leave the house, I am basically normally clothed and somewhat equipped. I will be even more so, when I reach my car, parked in the driveway. Someday I may be able to report how well this rig works in the event of a nocturnal earthquake.....