I recently witnessed the latest upgrade to conveyor belt sushi. In this video, you can see the conveyor belts going past the customers, but they still must monitor the sushi going past to pick up their orders.

In a newer restaurant I recently went to, each table has a secondary conveyor belt going right up to the table. After you've placed the order, your plate of sushi rolls to your table like usual, but in addition it then pushes that plate so that it rolls right in front of you on the table.