Well, that was the lamest collection of reasons I've ever seen.
It's client-server all over again? Umm. Yeah? So? Most enterprise applications are client-server. Include document and process management and your entire network is a gigantic client-server system. Come on. Is that supposed to scare anyone? Really? Wow. Should every employee have a browser? Hell yeah. If they have a computer they should have a browser. If you have a problem with your employees doing other stuff than work then you have a problem that won't go away because you take away the browser. That should be obvious to anyone who has ever been an employer.
And saying that the web is a place that is dominated by big players is just ludicrous when advocating working on the desktop instead. (I don't think I need to spell this one out for you)
No, this is all crap. There are valid reasons why certain applications shouldn't be web based. But the article lists none of these. Too much load on the datacenter. I mean seriously. Come on!