I don't think its really a black and white comparison. Obviously desktops have advantages and laptops have advantages. You dont want to lug around a 22 inch screen on your laptop but for your desktop, you want that. You're not going to get the latest and greatest hardware on a laptop, but you can on a desktop. Laptops are portable and good enough for most people, but a bit pricier than desktops.
It's a different tool for a different job kind of thing, the summary makes it seem simpler than that.