In the context of 'normals' motion control is a gimmick, yes. Normal is sitting down with a controller and playing a game. It's the standard that's been in place since 1978. Releasing a very underpowered console that sold tons because you could play Frisbee golf with it is a gimmick, yes. That's the only reason we had one in our house, for party games when I was in the military and actually threw parties regularly. It's not derogatory to call this spade a spade, they made tons of money off of a system that didn't meet the industry expected specifications.
I'm not in tune with this demo at all. It's touted as a Vita killer and I've never even seen a Vita in person. It's just one of those menu options I scroll past in the PS Store. Take it for what it's worth (not much).