I would never give up a desktop. I use my desktop at home and I use my netbook when i'm out, and use my smartphone for when i'm in the car or at the store and need a map or need to check the grocery list. But would I ever replace a desktop or would I never ever buy one again? No. And do you really think businesses are going to buy smartphones and laptops for their business to replace their outdated desktops? Hell no.