To use a touchscreen effectively, you have to hold the camera with your left hand by the lens or mount, which, if you're shooting with anything but light lenses is what you should be doing anyway. Yes, it's not going to be very helpful when shooting wildlife or sports, but it's a tremendous asset when using things like TTL off-camera flash, shooting video or doing critical focus with LV (nothing new or unsaid here). Nope, it does not work well with your right hand on the grip, but that's not the point, either. In fact, I find that the greatest experience is achieved with both physical dials and a touchscreen, which is why I'm very interested in a possible Pentax implementation: my SL1 has the screen, but one lousy located dial, and my K-30 has the dials, but a 'dumb' screen.
The point about gloved shooting is hard to take seriously, as anything but the best controls will give one trouble as such. Things like the AF/MF lever on my camera give me enough trouble to adjust with gloves on, not to mention the D-Pad. A touchscreen might not help there, but it certainly won't hinder anything either.
To Yassarian: I'm very sure that the K-3 model update shall have a tilting screen (but not flipping): the 645Z has it, the D750 has it, the D7200 will have it, and now this unnamed camera shall have the flipping screen for video, taking care of that