2040 started with some good ideas - especially on boomers and Sylia's origin in relation to them. It opens fine - in a sort of clean, late 90's sort of way.
It goes to shit about the time everything starts melting, and gets silly when the skyscraper turns into a naked girl and blasts to orbit in a sort of evangelion knockoff. It could've done without the whole Sotai effect thing.
It just wasn't as fun. The original series did a lot of - in hindisight, gonzo things - but they were fun and entertaining the whole time and the soundtrack kept it's end up - while the animation was more interesting to look at. It had more colour and shade - it wasn't just sort of bland pastel. There was a lot more black used.