I can see the value in a combo sink dishwasher like this Eco Automatic concept from Electrolux and Ahha Project.  Why not eliminate a step in the middle and put the sink to better use?  The concept has two racks rotating on an axis — fill one side, spin it around, let it wash, and work from the other side.  Seems like it may be tough to fill up a crescent-shaped bowl, but other than that, Eco Automatic could be the kitchen appliance of the future.  Thoughts?

Credits: Ahha Project; noticed at 3rings.