Will there be killer RIA apps? The only way I can see it happening is<p>1) when they become light-weight enough that they become preferred apps on light-weight devices, i.e. cell phones, pdas, MIDs, etc.
As right now, they're more processor intensive (at least Silverlight and Flash/Flex/Air are) than apps written with more established technology. Causing battery life to be dismal.<p>2) Internet connection becomes truly widespread. (Only spelunking caves and Montana should be the places where you can't get internet connection.) And not only widespread, but fast, too. No point in having Rich Internet Applications if the Internet part is a part of the bottleneck.