Vertical / mixed-use construction trend in pakistan

Help me understand here. How come mix-use real estate projects are getting so popular lately? I understand the need for vertical constructions but now there are residential floors in almost all elitist malls. Is the market demand for apartments actually that high?

Actually,a lot of times, market does not work on demand, but actually creating it. At a glance, apartment living may seem like a luxurious or unnecessary idea, but it is actually the need of the hour. And in order to make the public realise that, we have to put the product right in front of them. And with good marketing efforts (and that is debatable on its own) will help create the need, hence, people willing to buy the apartments.