no airline would ever buy it. half the passengers would be throwing up. many passengers who just want to sleep would hate it. the airlines don't want to remind you that you're flying through the air. if anything they want you to sit in the dark until you magically arrive at your destination.
What is old is new again. The Zeppelin's had large observation windows. The Graf Zeppelin had to make its way through some bad weather, day and night flying, in its many travels (book recommendation: "Dr. Eckener's Dream Machine" by Douglas Botting; great account of its 1928 round-the-world travel.)
Hindeberg promenade:
Video made from a number of newsreel shorts of the Graf Zeppelin that gives some idea of the views: