Before we all go dancing on Intel's grave here, let's just take a second to look at their trajectory and consider the possibility of AMD following suit. Intel held too much control for too long, which is how we got "What are you gonna do about it?" security 'features', stagnated development, etc. If they leave the market, or pull a Microsoft and decide to focus almost completely on the corporate world, that will leave AMD in the position to start abusing its customers and resting on its laurels same as Intel did.
Maybe ARM PCs coming along and opening up the market a bit won't be so bad after all, though I worry about instruction set incompatibilities etc killing our ability to run older software.