I can't see motion control catching on. It was a rather lousy gimmick for a health-nut generation of games. Old-fashioned on-the-couch controller gaming is the gold standard.
I can also foresee SMELL-O-VISION
(just kidding)
Maybe the next-gen consoles will feature 3D for some of their games.
(didn't we try that once, like fifteen years ago?)
I can't see the great PC-vs.-Console war lasting much longer. It's all about graphics and mods anyway.
And on the subject of mods, I believe that someday consoles will have a modding community.
"I have a dream that one day, down in cyberspace, with its vicious PC supremacists, with its game companies having their lips dripping with the words of PC superiority and console inferiority; one day right there in cyberspace, little PC gamer boys and PC gamer girls will be able to join hands with little console gamer boys and console gamer girls as sisters and brothers."