RoR and client-side MVC

Rails
1

Hi. RoR does a great job with MVC pattern in the server-side, plus it´s
integrated with great javascript libraries: scriptaculous and prototype,
but these libraries are not mvc frwrks. (not that this is a problem)

It´s yet a relatively new topic, but I think client-side mvc frwrks are
catching up. To name a few:

  1. JavascriptMVC: http://javascriptmvc.com/
  2. SproutCore: http://www.sproutcore.com/
  3. TrimPath Junction:
    Google Code Archive - Long-term storage for Google Code Project Hosting.
  4. Axiom Stack: http://www.axiomstack.com/
  5. Archetype : http://archetypejs.org/

And now comes the doubts:

  1. Is it really a good idea to use mvc pattern in the client-side?
  2. If so, mixing directory structure from some client-side frwrk with
    RoR will be very confusing
  3. Maybe the best thing is wait until RoR integrate some of this frwrks?

I´d like to hear some personal opinions in this suject.