this has been hinted at for years. its perfectly in line with the cloud computing that microsoft wants to embrace. win8 sounds like it will be the first os that gets a lot of its speed via the cloud. just like the palm pixe os does... the phone is pretty much crap but the os is not run by the phone. all it does is basically vnc into the cloud. my cell phones can run vnc software well as it is, its not a far stretch of the imagination to see how it will work, and easy to see why big corporations want it.
they will be able to sell you crappy hardware that seems to work fast (so you still pay that hardware premium), you wont have to install most apps (youll still be able to install anything you want, or you can conveniently pick from their software in their pay-for list and start using it right away), never have to worry about drivers or file registers, no updating, no antivirus to mess with, you add built-in auto backups of your entire system without extra cost, and overall drastically reduced customer support for stupid computer problems that are the end users own dumb fault anyway.
it also means the end of a lot of physical software discs made, which means the end of a lot of piracy. for business, the pros of cloud computing absolutely dwarf the cons. for the end users, it likely means we will have to wait for government intervention pushing net neutrality before we actually see the benefits for us.