Some people around here flip-flop on the issue depending on the latest stats.
Don't be fooled.
Next quarter you'll see very, very different numbers. Over the next 3-5 years you'll see the decline of the entire PC market and a shift over to tablets and pad devices as they become more capable and powerful. The ecosystem is already in place. The content distribution model is already in place. Look what you can already do with an iPad. Mirror games onto HDTVs. Photoshop on the iPad. The list goes on. And note how quickly this all happened.
So be it but untill that thing can run a full version of let's say Autodesk Maya and install all the plug-ins in the world I want it will still only be a mobile toy. A PC is something you work with not a fancy looking gadget. I don't see this happening in the next 5-10 years. Pack me a dual quad with HT that can run for 100 days at 100% without breaking a sweat. That's a PC.