Yes, I use Adobe Flash, not because I like it, but because Youtube still forces me to use it. (most sites I visit don't need flash for other things than displaying ads, which I block with Adblock, OC) Try for instance, play any music video from VEVO or other content provider... Or even simpler, try to play any content from (most) youtube "channels". Are they converted to WebM? I don't think so!
Originally Posted by BlackStar
Now another question for you, what do you prefer, to use a plug-in to view your web videos or having that support directly in your browser as a standard? (The answer is quite simple, I think)
Furthermore, Flash has only acceleration with a "semi-proprietary" video implementation (VDPAU), which only works for a limited group of users (nVidia proprietary driver users).
Personally, what Google wants to do with Chrome is not a very good decision, because it will make some "semi-useless" plugins (Flash) live longer...