I'm afraid I'm going to have to disagree with you there, I didn't like The New Tetris at all. Basically the game was made to be way too easy, with the next three pieces being displayed, being able to hold onto a piece, the mind-numbingly slow rate that the speed increases, etc. The game has framerate issues when played with three or four players, and the soundtrack is horrible. The tunes are repetitive, use annoying instruments, and there’s even one that sounds like someone dying. And that whole Wonders thing was just stupid. If I want to learn about the Wonders of the World, I’ll go read a history book. I also can't believe that they removed the scoring system, that makes no sense.
Now, Tetrisphere, on the other hand, is the single greatest puzzle game ever crafted. Believe it.