@TheJoe: I expect it will be a time-bombed but otherwise fully functional version like with preview releases of earlier Windows versions.
Disclaimer: I have no insider information on this point, this is just an educated guess.
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@Plumber: Gas, water, and electricity are the first three, and now the Internet is the fourth.
Actually, on account.live.com you can remove all trusted devices so they'll have to use a code again. So if your laptop gets stolen, simply do that and they still won't be able to get into your account. Or just change your password, for that matter, which would require them to sign in again even though you selected "remember me."