you could have two in the same space as your current washer and dryer.

Who would really get 2 of these though. The whole purpose of them is to save space so I imagine most people only get 1. I would also guess that it would be much more expensive to have 2 combined units than to have a seperate washer and dryer. Is it really that big of a pain to move your clothes from the washer to the dryer? It only takes a few seconds.