We're currently analyzing these technologies for our startup's web app, so this is quite helpful.

SproutCore seems to be in the lead at the moment.

The heavyweight category needs to be split up.

Technologies like flex / silverlight / javafx / open laszlo use compiled binaries to run their applications via a browser plugin (flash, java vm, silverlight vm).

The other products in the heavyweight category utilize HTML / Javascript and don't require plugins. That's a big difference that this person seemed to miss...

You are right that that is a big difference, but I wasn't trying to compare these technologies based on their runtimes - I was attempting to compare them based on the type of application they attempt to produce. I wanted to make this a very simplistic list without going down the slippery slope of explaining too much about each technology (as there is a LOT about each technology to explain). The way I see it, these are two different approaches to creating a desktop-like RIA, but the end goal is the same.

"Comparison" is a bit of a stretch... I'd say more like a list.

Fair point - I changed the name in the article (though can't edit it here). I wasn't really sure what to call the post, but I'd say it's a bit more than a list =).