HTML5 has long been promoted by Apple, Google, Mozilla, Opera, Microsoft, etc. as the future for the web. Apple even went as far as not supporting Flash on its mobile platforms (iOS) to further promotes the use of HTML5 in web site development.
Apple’s decision caused a major war of words between Adobe and Apple, plus all sort of underhanded tactics from both companies in an attempt to cripple the other’s technology/platform. Adobe recently released a new version of its mobile Flash, but it done so for almost all mobile platforms except for iOS. This is often seen as a retaliation of Apple’s modifications to its iOS Developers’ Terms of Use, to exclude tools like the one found in the latest Adobe’s Flash development environment.