Whether or not you agree with Apple going all-in on HTML5, they're certainly putting their clout where their mouth is, launching a new showcase on Apple.com, complete with some terrific demos and a link to developer.apple.com for those who want to roll their own interactive, standards based solutions.
If there was any remaining, lingering doubt, HTML5 and Safari are Apple's open app platform and they're going all in. How far are we from a future where HTML5 and web apps are legitimate peers to native apps in terms of delivering the functionality and features users need?
UPDATE: 9to5Mac points out you can get these to open in other HTML5 browsers like Chrome or Firefox by going to the developer.apple.com page. Weird.