This is totally dependent on what console generation you started w/ and which one followed. Going from whichever system was your first foray into games, what new game/system that was coming out made you think the graphics were unbelievably good?
I fully got into games w/ the 6th generation, and while I noticed that there were games that were prettier than others, the 7th gen (mainly PS3) is what had me notice how good graphics were getting. And Metal Gear Solid 4 was one of the earliest PS3 games I played that I thought was graphically impressive. The characters look closer to real people than ever before (at the time), and I loved the way it transitioned from cutscene to gameplay sometimes. It was truly a next generation experience for me.
I fully got into games w/ the 6th generation, and while I noticed that there were games that were prettier than others, the 7th gen (mainly PS3) is what had me notice how good graphics were getting. And Metal Gear Solid 4 was one of the earliest PS3 games I played that I thought was graphically impressive. The characters look closer to real people than ever before (at the time), and I loved the way it transitioned from cutscene to gameplay sometimes. It was truly a next generation experience for me.