Putting a wall on the kitchen island

Here are a couple of model pictures to show what the kitchen island would look like with a 12 inch high wall on the dining room side.

Designing our new kitchen

So as we go about designing our new kitchen, we have one small but nagging question yet to resolve.

As you will have seen from the plans, we have an island in the kitchen. The question is, do we put a raised shelf on the side of the island facing the dining room or not (see examples below)? If we do, then cooking clutter in the kitchen could be hidden from view during dinner, but if we don't, we get the widest possible work surface, which could be great for tasks such as rolling out dough.

What do you think?