With the recent Vimeo and Youtube announcements that Flash would effectively become a fallback delivery format in the future, people have been too caught up in the Theora discussions to say much about this potential deathblow for Flash.<p>As Gruber says, when people say Flash support, they basically mean Youtube. Once Youtube goes native, all the other sites need to rethink their usage because Flash is no longer <i>necessary</i> on phones, tablets etc. and indeed, even for platforms that support it I can see Flash blockers and selective Flash usage becoming popular for battery life reasons alone.