The amenities and food service depend on the price point that the market will support. I fly on commercial planes that have showers and private rooms but the price point is beyond eye watering. The Canadian rockies scenery during the day is worth seeing. The Japanese run ultra high end sight seeing trains but the one way ticket is $10,000/person, double occupancy.
While I have never done the Chicago to California trip via the Rockies, my dad and wife did. The had a state room so they enjoyed it. As Tom said, it is all about the excursion price point. It wasn't cheap.