Flash 10.1 has been in public beta for less than 6 months, and only accelerates decoding on minority hardware. A few percent of their install base has it, tops. Flash on Windows decodes video at unaccelerated libavcodec speeds just fine without it.
They're pushing this angle because it makes them out to be the heroes -- see the passive-aggressive spiel you get when you visit the Flash page on an iPhone -- they'd love to frame everything as "if only Apple would let us". Unfortunately it's not true in the slightest.
Nobody's shipping a full Flash player for Android or WebOS because it doesn't exist. Maemo can use a standard desktop NSAPI plugin, but Nokia+Mozilla won't ship the one Adobe has compiled for them because it's too shitty. All of this has been "6 months away" for years now, going back to the Macromedia days.