With the announcement of the iPad, the usual suspects have come out decrying a closed, proprietary, fully locked down system.
For instance, a story on the top of Hacker News today says:
This is what I asked in January 2007 on this site, shortly after the original iPhone was launched: "1. Will Apple lock down the iPhone, blocking Flash, Java, custom widgets, and open development from its new platform? 2. Could Apple’s multi-touch patents actually stifle growth of new, interactive displays?" Unfortunately, that turned out to prescient
And the FSF is out there calling this an unprecedented march of DRM:
With new tablet device, Apple's Steve Jobs pushes unprecedented extension of DRM to a new class of general purpose computers
It's a fair initial reaction. Apple didn't build a general-purpose computer as its next entry into the market. Instead, they built a heavily proprietary, locked down device. In order to install an application onto the device, Apple must approve the application.
I don't need to address the merits of the argument against how Apple handles native applications, because it's irrelevant. A much, much larger force is at work here.
With the iPad, Apple has created two platforms. First, they have produced a heavily proprietary, native platform that requires Apple approval and has significant Apple restrictions. But ironically, with their heavy focus on improving the quality of Safari and the HTML standard, they have shipped the iPad with a platform based on open, unencumbered technologies.
Additionally, Apple has remained at the forefront of these technologies, literally building some of them for mobile devices (hardware-accelerated animations were built for the iPhone, and by extension, the iPad). The Open Source Webkit project has remained extremely active, and in fact, has only accelerated progress since Apple first released its Native SDK, so Apple's "locked down" strategy has a very carefully carved out intentional exception.
Apple even makes it easy to take a web app and put it on the home screen amongst normal apps. When you do this, the iPhone downloads all the assets in the HTML5 cache manifest to make the work better as an offline app. This is how I use Gmail on my iPhone (because Google knows what's going on in this space, they leverage new tech in Safari quite well). When Apple rejected Google Voice, Google immediately built a Safari version of the app. The way they tell it:
Already, Google says it is readying a replacement for the Google Voice app that will offer exactly the same features as the rejected app—except that it will take the form of a specialized, iPhone-shaped Web page
Ironically, despite claims that not allowing Flash or Java represent a victory for proprietary technologies and a loss for open technologies, they represent quite the opposite. By restricting the web platform on the iPhone and iPad to open, patent-free, technologies, Apple has created a highly desirable market for pure-HTML5 apps. This is, frankly, a win for supporters of open technologies.