I believe the answer ought to be “HTML” for all of them.
Of course, in the interim there have been platforms that have waxed and waned in popularity. Off the top of my head,
- Microsoft’s MFC/.NET platform.
- Apple’s Cocoa, iOS frameworks.
- Google’s Android SDK.
These are some platforms available now that make sense to develop on, whether for performance, discoverability, stability, or industry convention. That said, web apps have shown their resilience, and that they’re going to stick around. When I saw Microsoft announce Windows 8 today with native HTML5 app support, I figured that sticking with HTML is a great strategy on both sides of the platform.
Of course, Microsoft is hardly the first company trying to leverage web architecture for an operating system; Google’s Chrome OS is about to be released and HP’s WebOS is already in phones. Native support for the most popular customer OS in the world, though, is a pretty big deal: it puts web apps on the same standing as Microsoft’s own .NET, and acknowledges that web development can create a good user experience.
For application developers, the web stack now fulfills the “write once run anywhere” premise that Java made all those years ago. Browsers have reached a somewhat of a parity across computing platforms (desktop, mobile, and tablet), and development time is no longer doubled from having to support uncooperative clients. Web frameworks and libraries are abundant and provide a wide field of choice, from easy-to-use scripting languages with built-in MVC architecture, to fast-running minimalist templating systems holding up thousands of clients per server deployed. And since code is pushed from servers to the browser client, pushing out patches, bug fixes and new features is just a new user session away.
For systems vendors and OS makers, supporting web technologies means attracting all the developers who have converted to the web stack, without having to spend nearly as much effort evangelizing a new platform (Apple’s WWDC, Microsoft’s PDC, and Google’s I/O are such events, although obviously they do a lot more). Getting easy ports of web applications is also a big plus, as evident by how often Angry Birds is cited as the app to legitimize a new platform. Supporting HTML gives a platform an instant developer base.
App frameworks like Sproutcore alleviate this issue to an extent, but OS vendors will want applications to retain their OS’s look-and-feel, and it’ll be up to the developer to provide a UI that’s better than the OS default and convince users to switch to using it. We already see this in some ways – Skype clients embed a good amount of HTML, and Adobe Air apps feel independent from the OS – so it’s more in changing the way users think about their apps, on both desktop and mobile.
- Full disclosure: I’m a web front-end engineer, so obviously there’s some bias.↑
- I hate using the term “app developers”, as “app” is now perverted to mean native mobile application, and as of 2011 typically means you’re writing iOS code in Objective C.↑
- That is, Microsoft is no longer trying to actively reduce web developers’ life expectancies. Older versions of IE continue to hang around like unwanted tumors.↑