Shutter Island turns ten years old this week, and watching the new 4K Blu-ray, I couldn't help but feel like director Martin Scorsese was showing off. For Scorsese, I'm sure his adaptation of Dennis Lehane's novel is more of a love letter to the classic horror of folks like Val Lewton and Alfred Hitchcock, but watching the film today looks like Scorsese strolling into the horror space, casually owning it, and then moving on. Whereas other directors struggle and grasp to find a way to do psychological horror, Scorsese basically does it as a one-off, …