For me, it was Gears of War for the 360. I was amazed by the lighting and textures, especially outside with the stone columns and landscape. Compare that to the launch titles like Quake 4 (which ran at about 15 fps half of the time) and the Burnout up-scaled port. Honestly, when I got the 360 at launch I started to have serious regrets about its power until Gears came out. I think we are repeating that phase when this next gen of consoles.
On the PS3, I was blown away when I played Uncharted during the infamous waterfall level. MGS4 also really impressed me along with Killzone 2 the following year. Those titles made me realize that the PS3 could actually be a gaming console rather than a 600 dollar Blu-Ray player.
Overall, last gen was impressive for me until the Nvidia 8800GT was released. That card could match the GPU in the 360 and from then on it was the PC who took the lead.
On the PS3, I was blown away when I played Uncharted during the infamous waterfall level. MGS4 also really impressed me along with Killzone 2 the following year. Those titles made me realize that the PS3 could actually be a gaming console rather than a 600 dollar Blu-Ray player.
Overall, last gen was impressive for me until the Nvidia 8800GT was released. That card could match the GPU in the 360 and from then on it was the PC who took the lead.