1. New Console Features
Let's think about this one for a moment, the last generation brought the ability to play over broadband. This generation brought everything in-between, social media, digital stores, Internet browsers, and the numerous accessories that created new gaming trends. I don't know what each console will have up it's sleeve, but we can imagine and dream of what's going to be next. The ideas and possibilities are limitless!
0 (Yes, 0). Backwards Compatibility
This will be the biggest downfall for the two new consoles stepping up to take on the giants; however, backwards compatibility isn't always a buy factor. I, for example, had a PS2 and when the new consoles came out I immediately purchased an X360. I had no intentions or desire to play "old" games, and I've never regretted it for that decision. I'm just one person though, and what sells me, isn't what sells you - which is why next-gen consoles having backwards compatibility is a must. The current consoles have to keep that relationship with their current customers to keep pace in the next-generation. So that's what I've got. I may not have covered what you want, but I felt rehashing old topics like better graphics wouldn't help anyone. Let's hear what you want next-gen!