TwoSeven: On the other point, the default option I was presented with when upgrading to win 8 was that my email address was requried to log in (this I suspect ties the OS and user data to the cloud) which I am not keen on. The menu for local acounts was not obvious. Using the email thing is ok for a tablet (I dont need to do it on my Ipad though as an example) but for a desktop I prefer the local login, then type a credential if accessing an online service.
It's optional. Once you switch to Local Account you continue as usual.
There's no "cloud enforcement" anywhere.