I’ve been having the same kind of dilemmas for a while now.
This post is an example of the questions I’ve been asking myself and the forum. Flash was a good motion graphics tool but performance has been worst and worst over time and some development hiccups like those png sequences import times are enough to (not so) slowly transition to html templates.
I’ve found html templates just as capable as flash ones in terms of “artistic expression capabilities”, only finding limitations in terms of template->server interactions.
What kind of graphics are you saying? I find them pretty simple to achieve in html or flash. The hard part is the AR ones.
I wish some 3D engine would make it into a producer for REALLY appealing templates and full GPU rendering and mixing. Just dreaming out loud.