Most ground breaking games of the decade and why?

The tekken games look more alike than the SF ones...

Tekken games just look like better graphics each game and different characters. At least SF has different types of supers that are noticeable.

but the series wasn't limping - if it was Capcom would have stopped.

they learned their market was not the mainstream anymore. they focused on the competitive scene and tailored the games towards them.

 

No, he said perhaps a hypothetical SF6 or SF7 could revisit the 3D gameplay idea. Meaning that SF needs to run its course a bit more (existing on a 2D plane) before changing it to that extent.

As for groundbreaking games of the decade? I believe Jet Set Radio (2000) sparked a mini-movement of more artistic games, including Clover / Grasshopper / Platinum Games' output.