Web based SCADA article by Eduard van Loenen of Yokogawa’s Global SCADA Center in The Netherlands. Kudos to Dan for pointing it out. He brings many great points to the table of the advantages to the trend of web based SCADA systems.
From a security perspective, I disagree that IT technologies are "more susceptable to cyber attacks" than "rigid proprietary software". The cyber attacks will come since systems are being networked and remotely accessbile, which is a productivity enhancing user requirement in modern manufacturing. Proprietary software tends to be less secure than modern IT technologies, especially as the Internet makes exploits more widely available.
Good article, though!