Wow! What concept art! I love the look of the hotel, and the glass in front of the elevators. It seems that they've killed the "Dissapering wings" stoyline, and have gone for a new, Twilight Zone-less approach. I love the look of the hotel!
A big difference for the Tokyo version is that there are only broken, stained glass windows visable from the outside. This is because the Japanese aren't very inclined to enter into a building that looks "unsafe". Hence, the partially destroyed look of the other two TOT's wouldn't go over well in Japan. They opted for something more subtle.