Did you read the original PC World article, or just what "they" said? See:
http://www.pcworld.com/news/article/0,aid,122738,00.asp
I'm not the multimedia copyright expert around here but the problem apparently applies only to viewing protected content on a HDTV or widescreen monitor. There's a comment about MS agreeing to the film industry's dictates, so the movie companies are who you need to complain about, not MS. The article clearly is about protected content only; your monitor will continue to work just fine for everything else. I know you weren't worried about viewing pirated videos, were you?
The only FUD I see here is the 150 hits I got for "vista monitor revoked PC World" on Google. None of the few I checked could be bothered to link back to the original article, but they sure could misquote it and jump to conclusions.
I don't buy MS just because it's MS. I buy their products at work because of corporate dictates, and because I've had no complaints with their products at home.