I wouldn't go quite so far as to say this game looks "boring" but most of that video didn't really do anything interesting. Looks like a reskinned Halo with a handful of borderlands style elements (having unique classes to play through missions , enemies displaying health bars , damage more obviously calculated , loot being available). I don't think this is a problem, Halo has sold millions and so has Borderlands so mixing elements of the 2 should be a winning formula for success.
The problem that I have is the way this video was presented- it was like a proof of concept almost "hey look, this is still a bungie game and this is how Destiny will handle missions similar to what you got out of our halo games". My response is more of "okay well, that's good I guess but I've played 5 halo games in the last decade or so, show me something new". All this video shows that looks new is a handful of special abilities and a little bit more in the way of group based tactics.
I'm not saying it was a total "blah" demonstration but , Destiny will have to do more to impress me is all. It's worth mentioning that I didn't find the graphics all that special either but I don't care so much as long as the end product is enjoyable and stable.