what you're describing isn't photography, but graphic design. That's fine, and of course people are free to corrupt their images as much as they want, but we really don't need another app for this, there are already hundreds of them and they all do the same stuff.
As for the OP suggesting these are works of art, yeah right.
These move photography away from being an accepted form of art, not towards it, these filter apps take photography more and more into the world of cheap throw-away effects. There's nothing new here, nothing that creates any real artistic value, it's just pixel pollution.
Along with t clarity slider in LR these apps are doing so much harm to the reputation of photography in the art world.