I've been thinking about this for a while. I have multiple pets and they often wake me in the night and I wonder how much their goings on affect my sleep. I also wonder if having an air-filtered environment for sleeping would help with breathing problems (not that I have any now but if I got sick or in the future when my body really begins breaking down). And how about a sound-insulated bed? Or an EMF-insulated bed? That could do some good as well. This sort of thing would not be difficult to build.