I've heard that the reason there are so many "varieties" of products in grocery stores (think varieties of Colgate toothpaste) is that the manufacturers are try

I've heard that the reason there are so many "varieties" of products in grocery stores (think varieties of Colgate toothpaste) is that the manufacturers are trying to maximize the shelf space their products take up. Are Google and Facebook doing the same thing with home screens? Is that why they're smashing their big apps into little ones?