DOCBOOK: Equation Enhancement Idea - Wishlist?

As I understand it equations in DocBook are actually just graphics. This is 
a lowest common denominator. Would it be possible at some time in the future
to allow equations in MathML. I know the tools are not really mature yet, but
it would allow the "equation-ness" to be retained, and allow neat things
like including the mathematical nature of the algorithm to be included with
code documenting it. Clearly TeX can output equations, and some web browsers
already have some MathML support. Is this a sensible thing for the future?
Perhaps in version 6 ?

Julian Satchell
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The above is my personal opinion, and does not represent the opinion of any 
organisation.