The only people I meet who voluntarily use web apps in their day to day are Linux users who have convinced themselves that it is good enough because there aren't any good native apps on Linux.

And then you of course have corporate, who will not switch from Windows.

Nobody will voluntarily spend all day working within Gmail or Google docs.

You also conveniently cut out photo editing and design in your quote.

Edit: Also I wonder if all you server-admins, programmers and gamers would have switched to Linux if your only option was to do your work or gaming within a laggy and inadequate web-app? But you want other people to suffer that.