Chances are your phone would be in your pocket and you would have to take it out... often difficult to do with gloves on. Again, I am not saying there is no possible use for gestures, the phone bump feature, or any of the other novel things the Samsung commercial attempts to show. I can imagine with some clever refinement some of these ideas could be really neat. However, as they are now, they appear to have extremely limited value and thus I consider gimmicks.
I myself don't like to take my phone out while having dinner or a meal with friends/family. 1) kind of rude 2) you risk your phone getting damaged by spills. That's just my experience and opinion. Would it really kill you to put the phone away while eating with friends and family? Or even waiting to clean your hands before taking out your phone and just re-dialing whomever called? As for the remote, would your devices need to be Samsung as well or will the app work as a universal remote like the Harmony remotes?