Very interesting idea! Although I'm not sure that it would actually make it easier for users that don't do tabbed navigation (mom) to log from a second/public computer.
So, if elegant for power users, and 'not easier' for mom-users, should we implement it?
I agree that the UX isn't perfect, but neither is our current login/password system for every site. For me personally, if I don't use a site regularly my login process turns into: click forgot password link, check my email, reset the password, then login. Then again the next time I visit the site 3 months later. So if that's what we're going up against, the email to login session flow isn't too bad.
So, if elegant for power users, and 'not easier' for mom-users, should we implement it?