This is FUD. Is windows 8 shipping? No. Are there any systems in the wild locked to windows 8. No. Have any vendors come out and said they plan to restrict FOSS from booting so I know who not to do business with? No.
Call me back when someone has actually locked out FOSS.
I can't get to the article, so I haven't read it yet and can't comment on it specifically. However, pre-emptive concern is not necessarily FUD. A little sabre-rattling can send a signal to manufacturers that they need to provide an option to disable secure boot or they will tick off a vocal customer base. Waiting until someone has actually locked out alternative operating systems is somewhat too late; the point is to prevent them from doing it in the first place.
Call me back when someone has actually locked out FOSS.