Rich Internet Applications (RIAs)
have always been about the user experience. RIAs, by (Wikipedia) definition, are web applications that have most of the characteristics of desktop applications, typically delivered through web-browser plug-ins or independently via sandboxes or virtual machines. The term
has many different definitions within the Internet development community, but all of those definitions boil down to enhancing the end-user experience in different ways. RIAs transfer the processing necessary for the user interface to the web client but keep the bulk of the data (maintaining the state of the program, its data, and so on) back in the application server, thus offering a better user experience with a lot more flare and pushing the boundaries of what we expect from the browser.