Now that we've hit the post-E3 gaming news lull perhaps it's a good time to read A Gamers' Manifesto in which David Wong and Hairmoimoi discuss twenty things that gamers want from the next generation of game consoles. Some of it is insightful, some of it is humorous, and some of it is contradictory, but it's all good fun.
Instant-Failure Stealth Levels. Ack. This brings back horrible memories of a Goldeneye level where if you tripped an alarm, an infinite number of bad guys poured forth. We knew a man who failed that level 37 times, then got the Infinite Health cheat for it and came back. He intentionally tripped the alarm, the guards rushed out. Laughing maniacally, he proceeded to shoot [them] for four hours, killing 1,183 of them - 682 with groin shots - before his thumbs cramped up. Your game should not create this kind of bitterness.
Also check out another article on the same website, Life After The Video Game Crash.
We're on a technological plateau. The next real leap, the next real difference in how we play games via sensory suits or neural inputs or whatever, is still too far away and too expensive. We once thought it would be VR headsets, but that technology turned out to be a headache-inducing fad, people's desire for tech novelty outweighed by their fear of being caught in an enormous electrical dorkhat.