It just seems a dull platformer with weird rewind powerup. Disappointing.

Ignore the deluded guy above, everyone. This is amazing. All of it.

Well - do not ignore him completely. Although he didn't give any solid arguments I can list quite a few things that should be considered while hyping this game into space...
E.g. it's nice that Jonathan came up with all these time-modifying abilities himself but in fact there are quite a few games that use similar systems - even flash games... (I don't remember the names.) Of course none of them combined all the different mechanisms the way Braid does but I'm just pointing out that similar things have been done before.
Another things is that I don't like platform puzzles - I'll try the game out for sure but it probably won't be my cup of tea...

We Want Turrican or Mario. This "Rick Dangerous" meets "Dull Puzzler XII" does not deserve all the hype it's getting.

Evidently, you only like boring, stale games

Something to keep in mind here is that I actually didn't show too much of the cool stuff in Braid, because the focus of the lecture was on prototyping, and I had already shown a lot of the cooler stuff in earlier lectures and was tired of talking about it, and I wanted to reduce the number of spoilers I am putting out there as the game gets closer to release.

So when you play the final thing, you will see a lot of interesting stuff that is not in that video.

The coolness of Braid is not supposed to be from any of the particular time behavior, but rather in what Braid is as a whole, integrated game.

I guess that's the reason the game hasn't been shown much at all (to keep the "cool stuff" a surprise), but if the cool stuff can be ruined so easily? At least, I haven't seen any of it.