Now, I know that there's been threads about this game before, but I'm damned if the search engine will find it.
Graphics look absolutely spectacular. Amazing atmpospheric post-processing. If anything, the whole visual style in color tone and lighting style reminds me of a David Fincher film.
The trailer shows quicktime events, but I'm actually not that worried. In all fairness, Quantic Dream is kind of the co-creator (along with Sony's God of War guys,) of the whole thing, and they did a great job with them in Indigo Prophecy. The presses were logically placed and not too difficult. More importantly, they weren't all that numerous. This being an adventure game, it's more there for climactic moments in the plot. In the ~12-15 hours in Indigo Prophecy, there was maybe 10 big landmark quicktime events, which is a fine frequency, for me.
But, probably the coolest thing I've heard about this game came from this week's 1Up Yours podcast. It was mentioned that at E3, Quantic Dream dropped the fact that not only will Heavy Rain have a demo, but that the demo will be a prequel to the game, and will be totally unique content which won't be in the retail game. Fantastic idea.
Only really bad thing about this game so far is that it's apparently a PS3 exclusive.