Well, according to a quick google that not true.
Microsoft said at the PDC 2008 that Windows 7 will cost the same price as Windows Vista did when it came out. They believe that is was a very good price, because the cost balance pays all the staff and profits needed. So we are looking at this:
Starter - £50.
Home Basic - £100.
Home Premium - £150.
Business - £170.
Ultimate - £200.
And then it should come down.
I agree with Microsoft on this, Windows Vista and Windows 7 is worth this much. No Operating System has reached its standards, not even Unix or Mac OS X. However Linux is worth its price definitely, because it's free. I believe Mac OS X is good for show-off businesses and media hobbyists (show-off or not).
http://answers.yahoo.com/question/index?qid=20081120085403AAKmFvq
(yes, I know - a reliable source I found there

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EDIT: Added emphasis