XHTML survival rate?

Hi

I am wondering (writing on a seminar) whether XHTML will take off, or it will stay the IPv6 of the web?

I can see that with the billions of HTML pages out there, where will the usage of XHTML come from, and why should anyone go that way?

I am very open for inputs on XHTML survivability / usability in a HTML dominated world.

Happy *ML'ing


Jens Jakob