Flash in gone from my computers. I think I uninstalled it last Aug, but almost immediately had to reinstall for the online Stanford AI class, but I removed it after the final.
Flash will be around for a few more years, and it certainly was needed for the past several years. However, as a sort of "dog fooding", I would encourage developers to uninstall it so we can help build a better "HTML5" web quicker. YouTube has html5 support, for example.
In short, a large number of people exercising the HTML5 web, and addressing its shortcomings, would definitely help accelerate the move to HTML5.
While this solution obviously won't work for most users, personally I just reach for youtube-dl (http://rg3.github.com/youtube-dl/) when I run into a video that YouTube won't serve with the HTML5 player. No flash, no ads, and no buffering.
Safari's ClickToFlash/ClickToPlugin is absolutely awesome as it replaces the basic placeholder with a (apparently QuickTime X) player with an overlay offering source format selection (including Flash object, and a download option). Chrome has a similar plugin, although less advanced (and generally more flaky). Firefox's FlashBlock is so limited and looks like a stab in the eye in comparison.
Gnash--the free flash movie player--plays those YouTube videos fine. Except it doesn't show the ads :) It doesn't really work for almost anything else expecting flash though.
Flash will be around for a few more years, and it certainly was needed for the past several years. However, as a sort of "dog fooding", I would encourage developers to uninstall it so we can help build a better "HTML5" web quicker. YouTube has html5 support, for example.
In short, a large number of people exercising the HTML5 web, and addressing its shortcomings, would definitely help accelerate the move to HTML5.