Here we go with another technical genius tossing in his two cents. Dee, for what it's worth no browser today natively supports Flash either. That's why you have to download a small application called a plugin to view Flash video in your browser. When the next version of browsers come around, there will also be a Flash plugin available for them and that isn't about to change anytime soon. Flash is also used for much more than displaying video, if you visit any escort websites you should know that many of them use flash for their animations and other graphics. I have a large number of clients who have rather extensive websites which use Flash encoding and none of them have any interest in spending money on re-coding their sites for non-flash capable devices. Many people who have their own personal websites also use Flash and will not change because they know Flash, it works for them, and they have already invested the time to learn it and spent the money for the program.
Will most if not all of the major commercial sites switch over or make their sites both HTML5 compatible and Flash enabled? Probably will given enough time. After all, corporate sites are there to sell you something and the best way to do that is to get the message out on the most platforms possible. But the web isn't only made of commercial sites and much of the most accurate and interesting information is found elsewhere.
By the way, from your oversized quote above " President Jeff Malkin sent me the chart above,
which he believes is representative of the Web in general, including mobile. " This is one person's opinion with no facts to back it other than his own business stats and he also has a vested interest in making money encoding video for people. I'll wait for independant confirmation based on multiple sources before believing anyone who is making a one off statement. Don't forget that before the iPad was released it was said to have a wide screen high def display, USB ports, two cameras, run a full operating system, and on and on and on... Unfortunately none of those predictions turned out to be true.
By the way, have you heard the news? The sky is falling and there's a wolf going after the sheep!!!
PS: You guys should try actually reading the comments section to the articles you post. You might actually learn something about what you're posting about.