For those who listen to the Anandtech podcasts this is not exactly a 'new' rumor. ~2 months ago they talked a bit about how Intel is having issues with the LGA platform on a technical level with the smaller chips that are coming to market, and so it needs to go. Their theory was that we would see BGA (or something like it) on everything from tablets to pre-fab desktops. The do-it-yourself market may still have an option for swapping out CPUs, but it would have to be something other than LGA.
Just remember that this is Intel we are talking about. This is the company a year ago that practically said that in the future we will purchase products based on our screen and form factor needs, and things like the CPU/GPU will not be a consideration because what is paired with the screen will be 'good enough' for what that form factor is expected to do. The CPU becomes transparent rather than the focus of the system. This idea becomes really interesting with the introduction of retina displays. When we know a 'maximum resolution' for a device, then it is possible to know a 'maximum processing power' that such a device will require for things like games. Or perhaps we dont even go that far? Maybe we get a 'max CPU power' for things like web browsing and document work, and games get streamed from the game provider?
Anywho; The idea is that everything becomes a terminal which is capable of handling 90% of user's needs. If you are doing something bigger than your terminal handle on its own (like mass storage, heavy gaming, design work, etc) then you would purchase a server to take those loads off of the local machine which would do all of the heavy lifting for you.
Conceptually I actually like this idea, but it is going to be a rough transition for those of us who like our big beefy glory rigs. But then again perhaps it won't be such a transition? I have already found that my rig is taking more and more of a home server role providing content for my wife's PC ad our phones, and I would almost like it better if it were tucked away in some other part of the house, and all I had in front of me was a silent user interface. So long as I get my 60fps in games, and a good experience with my NLE then I am good with it. But I think we need to see faster Ethernet standards to come down the pipe to make it a reality.
This is the ultimate push towards the cloud. Your phone, your 'desktop', and your tablet/laptop all become portals to your documents, programs, and information. They will be able to work together as a mesh of devices, all aware of eachother, perhaps to the point of being able to be used as a pool of screen realestate as a single UI across devices. But whatever the case, these devices will be cheap, easily replaceable, and have access to your stuff no matter where you are. Meanwhile all of your digital stuff stays safe locked in a closet, encrypted, and with drive redundancy. Thats where we are going. I hope that the big companies like MS and Intel don't screw it up through the transition.