I really hope they implement some kind of system that allows you to touch or grope the NPC's. It seems like it should be possible; with some clever positioning you can already move characters together to make them touch. They were very clever when they created their body physics, because even just brushing up against someone you can see that breasts or butts will shift or squeeze when they make contact with another NPC.
It would be great if they could take advantage of that body physics system to allow you to "reach out" and touch the NPC's directly, outside of sex animations, and see some basic reactions from the NPC being touched. I'm thinking they could do something similar to the way XStoryPlayer handles this, but without full sex (as the sex animations are far superior than anything you'd be able to create manually). I vastly prefer Wild Life's sex animation system and body physics to those of XSP's, but the one thing lacking so far is the ability to reach out and grab/touch others directly.