I've been planning to incorporate designs like this as we remodel. Mostly moveable furniture items, though, as I don't want to detract from the value of the house in case we suddenly need to move. I lean toward items like dog bed/end table, or a nook that's designed in such a way that sans bed it could be used as a display area for a special item, like a vase (for a non-pet-power).
Also, our full/unfinished basement is plumbed for a bathroom in one corner...but without any actual appliances, etc. I plan to wall it in, install the vent and a raised tub w/ good hair-catching strainers, and use it as an all-weather dog bathing/blowing out area. Someday...!
