http://www.joelonsoftware.com/items/2007/09/18.html
Astute essay on the state of web apps, and what might happen next, with comparisons to the place ofLotus 1-2-3 3.0 and Windows in computing history.
The trouble with the second stage was that there were no clear UI standards… the programmers almost had too much flexibility, so everybody did things in different ways, which made it hard, if you knew how to use program X, to also use program Y. WordPerfect and Lotus 1-2-3 had completely different menu systems, keyboard interfaces, and command structures. And copying data between them was out of the question.
And that’s exactly where we are with Ajax development today. Sure, yeah, the usability is much better than the first generation DOS apps, because we’ve learned some things since then. But Ajax apps can be inconsistent, and have a lot of trouble working together — you can’t really cut and paste objects from one Ajax app to another, for example, so I’m not sure how you get a picture from Gmail to Flickr. Come on guys, Cut and Paste was invented 25 years ago.