I think they will continue to exist if they focus on their unique strengths that online cannot compete with. They'll never compete as a place to get a good price on a commodity widget. They'll become places for things where experience, sensation, or interaction are important.

It seems as though their model is to have malls with Ikeas attached. Some with really large Ikeas, others with smaller Ikea pick-up points or whatever.

Ikea generates a ton of foot traffic. Using that as the anchor will probably guarantee a lot of traffic to the other stores in the mall (when many malls are losing their long standing anchors).

It seems like a pretty smart idea to me.