suppose you have a chart with a line series that represents some data and thresholds OK/Warning.
now what if the whole data in the chart is to be changed by the user.
of course you can supply her with some DataGrid to reflect the data and make the cells editable, then reflect the edited data back to the chart.
wouldn’t it be so much cooler and usable if she can just drag the data around on the chart?!
At least one SaaS vendor chooses rich clients over the browser. Let me tell you a secret; I believe in rich clients for complex database apps. Yeah, Flex/AJAX/etc. bring the browser into play, but I like Twitter on AIR better than in the browser...