Instead of stacking your heavy plates on top of each other, consider investing in a few dinner plate cradles to keep them upright and easy to pull out of the cupboard. These are also nice for drying plates next to the sink.
Penny Floor - don't know if I would have the patience for a whole floor. but a coffee or patio table would be nice! Also an easier way to do it is to put out the pennies then flatten then by, I don't know, maybe a broom or some thing.
Mobile home. On the road, it measures m by m, and once it has arrived at its destination its floorspace can be increased threefold in a matter of seconds. "De Markies" was awarded the Public Prize at the Rotterdam Design Prize