This is by no mean a full technical comparison between these technologies, just a chat between 2 geeks. One is a skeptic backend dude and the other one is yours truly, a GUI guy.
It started with an email from Eli (the backend dude) titled “the Next big thing”?
Guy: This is old… Let me know when Chrome will reach 99% of desktop computers.
Eli: HTML 5 is old? LOL. FYI, despite the fact that the spec is far from being finalized, browsers with sparks of HTML 5 support count among them ie8, ff3, opera and safari.
Eli: Yeah, yeah, I’ve heard the same thing about java applets about a decade ago… ;) Seems like the simplicity of markup languages makes them the long distance runners
Eli: Flash is mostly used to fill gaps in HTML, not to solve the huge problems in the complex applications the web is made of, isn’t it?
Eli: Yet, the idea of basing the web on some proprietary browser plug in is doubtable. Epic fall of java applets and endless annoying ActiveX bullshit are just a couple of examples. IMHO, the shortcoming of this approach is missing the idea that The Web is more than “screenfuls of text and graphics” ©. Layout engines, however, are here for more than a decade and markup languages – for ages, proving themselves in taking the web into the places no one was thinking then about.
P.S. The only thing Adobe aims is profit.
P.P.S. I love holy wars.
Guy: The proprietary thing is indeed an issue, it prevents Flash from being accepted in some areas of the web and by some users. E.g. the Wikipedia video project uses HTML 5 video, they can’t use anything that is closed. What prevents Flash from being open-sourced is that it contain 3rd party patent not owned by Adobe. Adobe is already trying to appeal to the open source crowed with the opening of some of its IP http://opensource.adobe.com. IMHO they might completely open the Flash runtime if and when it’ll be pushed to the wall by Microsoft and its new SilveLight (talking about proprietary ;).
Java and Active-X are completely different stories, each had its own reason to fail. Partially and shortly, it is too difficult to create a Java applet and its far from appealing to a designer. Active-x has no sandbox, hence it has a lot of security issues, and also runs only in IE.
HTML 5 is nice but the main holy war is between the reigning RIA world champion which is Adobe Flash and the challenger which is Microsoft SilverLight. There is much to be loved about this holy war, since it pushes the technologies forward and the biggest winners are us, the developers and the users.
(I’m talking about hard-core RIA, not some lightbox image gallery which is still preferably done in HTML)
P.S. Adobe isn’t a saint, but, everyone want to make some profit, even google, even us as I recall If you gain it morally and also use it to make something like the web better, than it’s fine with me.