I’ve been hearing this a lot recently but I still don’t see it. Smartphones and tablets are great for browsing the web or when you’re out and about, but I’m never going to want to write documents or code on them. If I’m on a business trip it’s a laptop I need, not a phone. While the majority of casual users may well switch to mobile devices there will be a need for laptops and desktops for power users for a while yet.