[ISSUE] Revise all Why Care.

Issue 12:
http://www.w3.org/QA/2004/09/qaspec-issues#no-012
Owner: None yet.

The Why Care need to be revised for their completeness.

Use this template.
"""
When your review "Why Care?", think about the benefits for:
	- the technology
	- the spec author
	- the end users of products
	- the implementers
"""


-- 
Karl Dubost - http://www.w3.org/People/karl/
W3C Conformance Manager
*** Be Strict To Be Cool ***