My dream scenario is that the Kinect would let you act out conversations with NPCs and it could read your voice/body language to see if you were lying or being suspicious or aggressive or whatever. But they can't even get it to work for turning the system on, so that's probably a feature that's 10 years out at least.
This reminded me of the early Double Fine Kinect prototype that they were experimenting with. Not nearly as sophisticated as what you're suggesting, but it was interesting to see something inspired along those lines within the really shitty limitations of Kinect.
Comedy during games is a strange beast, because we're so used to games being mostly objective things that can be rated. This game has good control, 10 for control. This game is technically superior to the other game that came out this year, 10 for graphics. Even the low standards for writing have people mostly nodding along to whatever "good" writing rises above the swamp.
Comedy is something we're all used to, have our own opinions on, and are not used to games really trying to handle until semi-recently. So a game could be incredibly funny to one person and just fall completely flat to another.
I think some of the funniest games are not the funniest written games. I think watching Goat Simulator is fucking hilarious, but not in the same way a scripted comedy movie is.
I do agree with you on the relative standard for writing, when the established norm is such a low bar a lot of games don't strive for much beyond it. And 100% it is totally subjective. I find things like Duke Nukem and Borderlands unbearably shitty, but I recognize that kind of humour does it for some people. But I think the larger problem is there isn't a lot of variety in the spectrum for comedy (as there is in other mediums) to satisfy different tastes, or at least games willing to take the risks to cater to those different tastes in their writing.