I'm pedantic, so I noticed it got a little blurred on the escaltor coming nearer you. Unless you have an SLR, and are looking right through the lens, checking if it's all in focus, you're not going to notice that. Even then, it's minimal.
But for a geometric shot like this, I'd say crispness and definition would be the order of the day. Which is why the framing, high contrast and B+W (which tends to add to the perceptio of contrast) works so well for it). It's a crisp, bold shot, and ultimately, you'e managed to make something as dull as an elevator look very interesting indeed.