Biggest leap from one system to its successor in the 3D era in your opinion

[Kyuu]

PS1 to PS2:

Tekken 3 to Tag, GT2 to GT3, AC3 to AC4, MGS1 to MGS2, GTA2 to GTA3, and SH to SH2. The heavenly feeling of 2001 will never be repeated (if partly because I'm old now). PS2's following years were strong but they didn't hold a candle to its 2001 imo. Wow factor, innovative games, cool new IPs, amazing sequels, etc