Please correct me if I'm wrong, but my perception is that the UK does not regard us as immigrants, but as migrants. They always choose their words carefully. A green card in the US implies permanent residence. Qualifying for the points systems of Australia and Canada results in, basically, permanent...

Hmmm it is too early to talk in these terms, about anything being "clear". We are all just busy speculating. Until the new Tier 1 guidance notes etc etc are available, publicly and IN WRITING, from an official source, not some visa agency or someone reading a memo over the phone, we are on...