Ever since the mid-1990s, pundits have predicted that the Internet and the desktop would merge. However, exactly what that means has taken time to emerge. Today, the most common vision is that the desktop will be reduced to the launchpad for online applications, which is the premise for Google's Chrome Operating System.
But, unperceived by most people, another possibility is now being defined in the KDE 4 series of releases: a vision of desktop-oriented computing in which individual applications are enhanced by Internet resources without being dependent on them, and all online interaction is not funneled through a browser. This vision of the merger of the Internet and the desktop seems a far healthier alternative than accepting online applications -- so much so that I believe that which of these visions wins out could directly determine the survival of free software.
By that, I do not mean that freely available source code is in any danger of disappearing. Rather, I mean that the goals of the free software movement -- loosely speaking, the complete control of computers by their users -- will become impossible if online applications become the core of personal computing.
At first, this statement may seem an exaggeration. After all, both online applications and what I am calling the expanded desktop both originate largely in the free and open source software (FOSS) community.
The idea of online applications -- in fact, most of what was called Web 2.0 a couple of years ago -- could hardly exist without FOSS's example of giving something away for free. If you investigate, many online applications have close connections to FOSS. ThinkFree Office originated as an office suite that supported GNU/Linux, while the apparently defunct Ajax series of applications were developed by Michael Robertson, best known for the founding of the Linspire distribution of GNU/Linux. Similarly Google Docs, perhaps the most successful online apps, were created by a company whose business model has always been heavily based on FOSS development.
As for the expanded desktop, its main proponent is KDE, one of the two most popular interfaces for FOSS operating systems. As with online applications, you can probably find examples of proprietary companies that support concepts similar to the expanded desktop, but, so far as I know, only KDE has articulated it as a development goal. KDE developer Aaron Seigo has gone so far as to suggest that it is a development of the desktop in which FOSS can take the lead.
Yet, despite this common origin, online applications and the expanded desktop are nearly complete opposites. With online applications, control of the software remains with its provider. Users are dependent upon the provider allowing them access, and choose (often, no doubt, without stopping to think that they are making a choice) to trust that the provider will honor their privacy and adequately secure their files.
In many cases, they have no way to determine for themselves that the provider is doing these things properly. Often, the only indication that the provider is not acting properly is when a problem arises, as those who had downloaded George Orwell's Nineteen Eighty-Four from Amazon recently found out when Amazon unilaterally decided to delete their purchases.
In other words, users of online applications are in exactly the same position as users of proprietary applications. Just as most users have no way of knowing whether Microsoft Office is recording and transmitting their actions, so users of online applications can never know how their data is being handled. Nor do most online applications make source code available, any more than proprietary desktop applications do. If anything, ensuring privacy and security is even harder with online applications than with an application on your hard drive, because you lack the accessibility and leisure to investigate.
By contrast, with the expanded desktop, the control of Internet applications remains firmly in the user's hands. You might make a rash choice about what application to let in past your firewall or SELinux, but you do not need to take anything on trust. You or your system administrator can know exactly what privacy and security measures are being taken, and when.
For example, in the current release of KDE, you can use the new geolocation support to connect to locate other KDE users nearby so that you can socialize or exchange information. If you want information about the music album you are playing in Amarok, you can access Wikipedia without troubling to open up your browser. If you want to download your photos from Facebook, you can do so from within digiKam. Although these are far from the first applications to access the web directly, the extent to which the latest releases of KDE applications are doing so amounts to an integration of the desktop and online resources that provides a clear alternative to the idea of online applications.