Trailer: The BBC's DOCTOR WHO 50th Anniversary

I'm playing catchup, so forgive me for posting a video I'm sure everyone's seen (and mostly likely freeze-framed to death already), but embedded above is the fancy 'bullet time' BBC trailer celebrating the Doctor Who 50th anniversary event - feature-length 3D special 'The Day of The Doctor' with Matt Smith joined by David Tennant in the TARDIS. I think it does a good job of building a sense of occasion, and it seems the titular "day" is something momentous that affects all incarnations of The Doctor, so that's cool. What does everyone make of it?