What happens to existing FBML Code once Mark Zuckerberg removes FBML?

I have just added the fb:comments FBML tag to a site.

Working 100%, but Facebook has a notification on the top of the documentation that reads:

"FBML has been deprecated. Starting June 1, 2012 FBML apps will no longer work as all FBML endpoints will be removed." - Ref : http://developers.facebook.com/docs/reference/fbml/comments_%28XFBML%29/

What happens to all existing Websites and Apps that uses FBML? Will it just be disabled?

I have to switch to FBJS , I am not sure that all FBML features are available in FBJS...

Example:

I am using the following code to add the facebook comments to my website:

<div id="fb-root"></div>
<script>    (function (d, s, id) {
        var js, fjs = d.getElementsByTagName(s)[0];
        if (d.getElementById(id)) { return; }
        js = d.createElement(s); js.id = id;
        js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";
        fjs.parentNode.insertBefore(js, fjs);
    } (document, 'script', 'facebook-jssdk'));</script>

<div class="fb-comments" data-href="{URL}" data-num-posts="30" data-width="626" publish_feed="true"></div>

I have worked with FBJS before, coding a successful oAuth Login, getting the logged in status, posting to wall etc.

How would I create fb:comments in FBJS?

Will FBML still work?

Solution

You misunderstood a couple of things here:

FBJS is deprecated too, I guess you mean Javascript-SDK
XFBML will continue to work, refer to this post.
Always refer to the roadmap.
I'm not really sure if Mark himself will remove the FBML support.