Honestly, I love the classic 2D Fallout, but that 3D doesn't sound so bad, for some reasons:
- As many people said, it allows new content.
- It doesn't kill post-nuclear-fallout style, but look well-mixed with the isometric scenary.
- It looks cool.
The only thing I hope is that they add 3D ONLY when they are sure of what they do, all is well-skinned, all animations are completed, etc...