It all depends what there is to look at. If you are traveling through the forest area, among the trees, the scenery would fly past in a blurred picture if you look out your window. However, if you are traveling over a vast land with Mt.Fuji in the distance, that would be something to look at.

I traveled in the ICE in Germany, also about similar speeds at the shinkansen, and some of the views are breath taking, and some views gave me a migraine.