I would like to peek behind the scenes of an IKEA restaurant some time. As a customer you get the feeling everything is thought out in minute detail, which it obviously is. The restaurant serves as a paid demonstration for flatware and cutlery, all of which is available for purchase from the store you're heading to after you've eaten. The food is portioned with surgical precision down to the scoop used for the mashed potatoes. The seating isn't too comfortable, because you're supposed to eat and gtfo to make room for the next customer.
I've never went to an IKEA to eat, but it's a great place to fuel up so you can negotiate the shopping maze without getting hangry half way.