Woaw, that's a beautiful demo!
I think your technology has potential to make an incredible game, I really love the part with the fuild physics over vehicules! The atmosphere of the game is also "peaceful" and relaxing, so yes, IMHO, it has potential!
That being said, I think you should rework your teaser video if you are looking for a publisher: I found it too long and lacking some rythm. The beginning is a bit too slow, you should try to show more impressive stuffs in the first seconds of the video. Also, I didn't really understood the last part with the police car. But the middle part, with all the cars physics and the fluids running under (or over?) them, woaw, that part made me wanting to buy this game right now to play it on my tablet!
