Motion gaming? Been doing that in the 70s. Achievements? Why I was getting those when I was playing on the Atari 2600. Cracked has listed
six "gaming innovations" that aren't really that innovated. And yes, I'm old enough to remember all of them.
On the list are some of my favorites. I played a few MUDs back in the day and now MMORPG's like World of Warcraft
garnered a ton of attention. The light pen was one peripheral I didn't have when I had the Vectrex, but man that machine was sweet. Yes, you had to put overlays on for color and everything was made up with lines, but it offered some of the most fun gaming I had when I was a kid.
The badges that Activision gave out though were really cool. I had one or two of them, but I didn't keep them.
If you want a little history lesson, check out Cracked's article.