These RIA have 3 major advanatges. First, they run in any browser and because they support Flash 5 they are displayale by 97% of those browsers. Second, the architecture of Laszlo RIA significantly reduces the amount of roundtripping required of Laszlo web applications. Because Flash and Laszlo can run other Flash .swf files, a whole array of third party Flash tools and visual effects become available.
With Laszlo and Mozillas XUL (which Oracle has tenatively committed to), developers now have two powerful and open source tools for developing much more robust and rich internet applications. As for Laszlo we suspect LZX and the Laszlo core will be used just like Beehive. Beehive is the core of BEAs Weblogic Workshop which has been open sourced. But BEA has gone onto to extend Beehive/BEA Weblogic Workshop with more extensive Web Service controls and orchestration features that are included in BEA Weblogic Server. I am purely guessing that Laszlo may take a similar approach but extending the reach of Laszlo interfaces to other devices – PDAs, mobile phones, perhaps Linux desktops etc.