Yes, I'm new as a poster, but I've been along time lurker on the forums.
Some people have been mentioning about the interactions of first person shooters. As a kid, I loved playing Star Wars: Jedi Knight: Dark Forces II. It made me feel powerful, like a whole world had opened up to me, that I could BE the hero against evil. I played with a mouse and keyboard.
In 2003 I played the first Halo game, on the chunky Xbox game pad. It felt comfortable ( and the chunkiness was something I think they should have kept as an optional extra for the 360 controllers) but didn't like the lack of precision with the controls for aiming compared to a mouse, which was still a concern for me when I played through Reach. And yet the Halo series was another stage and influence as I grew up, and I rate the first game as one of the best I've played, even if the pistol was OTT, because of that influence in my childhood.
What I'm trying to get at is that, in the long run, the control scheme for a game does not matter in the slightest. JK and Halo, plot wise, are ALMOST IDENTICAL. Become a super soldier to save the Universe as your whole world is destroyed around you (Kyle Katarn being hunted for the Valley of the Jedi by Jerec, going to the Valley of the Jedi, as a Jedi, to save the Universe / Master Chief seeing Reach fall and then attempting the Covenant from activating the rings to save the Universe as an augmented human), and yet they are still both good games!!
This is why I am going to agree with Bob, and say that the next generation of controllers on ANY device (console, PC or mobile) will be an adaptation of what has come before until Microsoft/Sony/Nintendo/Apple*/Google* buckle.
One of them will eventually become insignificant in the gaming market. this will lead them to cause a shift in the gaming paradigm. Look at the rise of Nintendo in popularity once the Wii was released, Apple when they released the iPod touch, or Google's sudden entrenchement into the mobile/tablet space with it's Android operating system).
This ALSO means that motion controllers (not necessarily gesture based motion) are here to stay for the forseeable future due to the appearent demand from the creation of a very casual market in 2005. That said, who knows what will happen in 5 years with the release of the next and possibly final generation of consoles, as James mentioned.
*Apple and Google are included as they compete directly with Nintendo, Sony and MS in the mobile/tablet application business, which will take off in a big way with games during the course of 2011, look at the Honeycomb and iOS presentations of recent times and look at the publication Angry Birds on both platforms if you don't believe me, but that's getting a little off topic.