Great browser support is about the only thing Rim is doing right. They should go all in on web apps. Join Mozilla's WebAPI project, make web apps a first-class citizen on BBX (not requiring their own webworks stuff)

CSS3 3D transform support surprised me too. I don't own a playbook, but when I ran one of my tests (https://ajf.me/stuff/htmcraft/200blocks/ - doesn't seem to work in IE properly) on an in-store demo model I was pleasantly surprised it ran with hardware acceleration, something I've only seen Safari do so far (Chrome doesn't on the desktop).