>>HTML5 isn't all that different from HTML1,2,3,or 4.
>>
>>You just use tags for video instead of Flash.
>
>Well, just for that, it would worth it. Cause, I hate to have to include those Flash modules when I have to.
>
>>Other than that, I don't see much of a difference, or why people that don't make web browsers would even care what is HTML5 and what isn't.
>
>I see that everything has to be XML compliant. That would probably be the big change wherever it has to be applied. So, in general, if I would want to benefit of HTML5 related tags, I would need to make sure the entire page is XML compliant. As of today, are most browsers compliant with HTML5?


If your documents are html4 compliant or xhtml1 compliant they are already xml compliant.

All browsers have been html5 compliant for a while, including mobile, even older blackberrys.

My DoodleMe app sends a url with x and y coordinates and that render on the client using the html5 canvas and it has worked absolutely everywhere.

Like I said, I'm not sure there's really a big differnce to anyone, unless you actually write web browsers.