What is this stuff?
It basically means Google is making it possible for every and any webbrowser to be able to legally display webvideos nativelly, not dependent on, possibly royalty-requiring, third parties (JAVA, Flash, whatever).
Ooh, very cool!
I put the chances of HTML5 replacing Java or Flash (they are separate programs) at next to zero. There won't be full support for HTML5 for at least 5+ years, depending on Microsoft's laziness (number one rule of web design: it should work on all browsers). After five years... we'll see.
HTML5 will be the next generation of the world wide web, but the standard
has been delayed by a clash over streaming video patent licensing
conditions. In a controversial move Microsoft and Apple indicated they
would support the H.264 video codec only, which is encumbered by more than
1000 patents.
Which basically means you are right about Microsoft (and Apple). Still, that is not exactly so out of Microsoft and Apple's offices... Remember them "Internet Explorer only" sites, the ones that actually had that displayed on their pages?...
Well, on M$'s part that was exactly what you are saying and it wasn't laziness at all, it was really a way to cut all other browsers out of the competition (those IE only sites were designed with Microsoft Frontpage, of course).
All the other browsers (including Apple's Safari) did however stick to the official HTML standards, the ones coming from the W3C. The mozilla suite becoming leaner by puting each of its parts into separate independent applications (Firefox, Thunderbird, ...), along with good marketing, made it possible for Firefox to quickly and significantly conquer marketshare off IE. The result was an increasingly higher number of people demanding webdesigners to drop icrosoft's monopoly-stand in favour of the open standards Firefox (and most every other webbrowser) followed.
So, yeah, what you say is what Microsoft (and aparently Apple too now)
want. Doesn't mean it's what
will happen. It's a three force dynamics: webbrowsers' projects, webpage authors and final clients. We'll see.