Most seat mockups are pretty worthless anyways - if you want to know what the cabin will look like on (for example) AA's new planes, look at the seating in thei

Most seat mockups are pretty worthless anyways - if you want to know what the cabin will look like on (for example) AA's new planes, look at the seating in their existing planes and change the backdrop. Seating is often manufactured by third-party companies and installed "aftermarket", and is designed to either harmonize with a company's existing livery, or be outstanding enough that it becomes a marketing feature for the airline.