I think CVS will gracefully step aside and stop new releases eventually and most the developers will move to the Subversion project. More and more vendors are supporting subversion, I think it just a matter of time
Author of <a href="http://www.amazon.com/exec/obidos/ASIN/1932394362/ref=jranch-20" target="_blank" rel="nofollow">Subversion in Action</a>