I think it would be possible or beneficial to create a little in-sink automatic dishwasher rack that connects to your taps. It couldn't hold much, and it probably wouldn't do such a good job, but think of the space savings. For small apartments or small kitchens, this could be a real benefit.
Mokalus of Borg
PS - Or maybe, by then, the benefits are just too small.
PPS - Because, really, you'd only fit a couple of plates in there, wouldn't you?