Falsh is used mostly for games and site logic.
Various creativity sites are falsh operated.
This is where HTML5 has hard times now, but I sure hope it eventually succeeds.
Falsh is completely unneeded for video, except for protected streams where it opposites WMV/silverlight and similar drm bs.
So when they rollout 64bit version for windows - everything is fine.
When they hold 64bit linux port for several months, plainly ignoring various security holes, suddenly a troll shows up with "why should you need 64bit for linux, 8bit is enough for you" question.